This changes hmm_vma_fault() to not take a global write fault flag for a
range but instead rely on caller to populate HMM pfns array with proper
fault flag ie HMM_PFN_VALID if driver want read fault for that address or
HMM_PFN_VALID and HMM_PFN_WRITE for write.
Moreover by setting HMM_PFN_DEVICE_PRIVATE the device driver can ask for
device private memory to be migrated back to system memory through page
fault.
This is more flexible API and it better reflects how device handles and
reports fault.
Link: http://lkml.kernel.org/r/20180323005527.758-15-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
No functional change, just create one function to handle pmd and one to
handle pte (hmm_vma_handle_pmd() and hmm_vma_handle_pte()).
Link: http://lkml.kernel.org/r/20180323005527.758-14-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Move hmm_pfns_clear() closer to where it is used to make it clear it is
not use by page table walkers.
Link: http://lkml.kernel.org/r/20180323005527.758-13-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Make naming consistent across code, DEVICE_PRIVATE is the name use outside
HMM code so use that one.
Link: http://lkml.kernel.org/r/20180323005527.758-12-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There is no point in differentiating between a range for which there is
not even a directory (and thus entries) and empty entry (pte_none() or
pmd_none() returns true).
Simply drop the distinction ie remove HMM_PFN_EMPTY flag and merge now
duplicate hmm_vma_walk_hole() and hmm_vma_walk_clear() functions.
Link: http://lkml.kernel.org/r/20180323005527.758-11-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Special vma (one with any of the VM_SPECIAL flags) can not be access by
device because there is no consistent model across device drivers on those
vma and their backing memory.
This patch directly use hmm_range struct for hmm_pfns_special() argument
as it is always affecting the whole vma and thus the whole range.
It also make behavior consistent after this patch both hmm_vma_fault() and
hmm_vma_get_pfns() returns -EINVAL when facing such vma. Previously
hmm_vma_fault() returned 0 and hmm_vma_get_pfns() return -EINVAL but both
were filling the HMM pfn array with special entry.
Link: http://lkml.kernel.org/r/20180323005527.758-10-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
All device driver we care about are using 64bits page table entry. In
order to match this and to avoid useless define convert all HMM pfn to
directly use uint64_t. It is a first step on the road to allow driver to
directly use pfn value return by HMM (saving memory and CPU cycles use for
conversion between the two).
Link: http://lkml.kernel.org/r/20180323005527.758-9-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Only peculiar architecture allow write without read thus assume that any
valid pfn do allow for read. Note we do not care for write only because
it does make sense with thing like atomic compare and exchange or any
other operations that allow you to get the memory value through them.
Link: http://lkml.kernel.org/r/20180323005527.758-8-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Both hmm_vma_fault() and hmm_vma_get_pfns() were taking a hmm_range struct
as parameter and were initializing that struct with others of their
parameters. Have caller of those function do this as they are likely to
already do and only pass this struct to both function this shorten
function signature and make it easier in the future to add new parameters
by simply adding them to the structure.
Link: http://lkml.kernel.org/r/20180323005527.758-7-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The private field of mm_walk struct point to an hmm_vma_walk struct and
not to the hmm_range struct desired. Fix to get proper struct pointer.
Link: http://lkml.kernel.org/r/20180323005527.758-6-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This code was lost in translation at one point. This properly call
mmu_notifier_unregister_no_release() once last user is gone. This fix the
zombie mm_struct as without this patch we do not drop the refcount we have
on it.
Link: http://lkml.kernel.org/r/20180323005527.758-5-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hmm_mirror_register() registers a callback for when the CPU pagetable is
modified. Normally, the device driver will call hmm_mirror_unregister()
when the process using the device is finished. However, if the process
exits uncleanly, the struct_mm can be destroyed with no warning to the
device driver.
Link: http://lkml.kernel.org/r/20180323005527.758-4-jglisse@redhat.com
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The #if/#else/#endif for IS_ENABLED(CONFIG_HMM) were wrong. Because of
this after multiple include there was multiple definition of both
hmm_mm_init() and hmm_mm_destroy() leading to build failure if HMM was
enabled (CONFIG_HMM set).
Link: http://lkml.kernel.org/r/20180323005527.758-3-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Update the documentation for HMM to fix minor typos and phrasing to be a
bit more readable.
Link: http://lkml.kernel.org/r/20180323005527.758-2-jglisse@redhat.com
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Cc: Stephen Bates <sbates@raithlin.com>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
memcg reclaim may alter pgdat->flags based on the state of LRU lists in
cgroup and its children. PGDAT_WRITEBACK may force kswapd to sleep
congested_wait(), PGDAT_DIRTY may force kswapd to writeback filesystem
pages. But the worst here is PGDAT_CONGESTED, since it may force all
direct reclaims to stall in wait_iff_congested(). Note that only kswapd
have powers to clear any of these bits. This might just never happen if
cgroup limits configured that way. So all direct reclaims will stall as
long as we have some congested bdi in the system.
Leave all pgdat->flags manipulations to kswapd. kswapd scans the whole
pgdat, only kswapd can clear pgdat->flags once node is balanced, thus
it's reasonable to leave all decisions about node state to kswapd.
Why only kswapd? Why not allow to global direct reclaim change these
flags? It is because currently only kswapd can clear these flags. I'm
less worried about the case when PGDAT_CONGESTED falsely not set, and
more worried about the case when it falsely set. If direct reclaimer
sets PGDAT_CONGESTED, do we have guarantee that after the congestion
problem is sorted out, kswapd will be woken up and clear the flag? It
seems like there is no such guarantee. E.g. direct reclaimers may
eventually balance pgdat and kswapd simply won't wake up (see
wakeup_kswapd()).
Moving pgdat->flags manipulation to kswapd, means that cgroup2 recalim
now loses its congestion throttling mechanism. Add per-cgroup
congestion state and throttle cgroup2 reclaimers if memcg is in
congestion state.
Currently there is no need in per-cgroup PGDAT_WRITEBACK and PGDAT_DIRTY
bits since they alter only kswapd behavior.
The problem could be easily demonstrated by creating heavy congestion in
one cgroup:
echo "+memory" > /sys/fs/cgroup/cgroup.subtree_control
mkdir -p /sys/fs/cgroup/congester
echo 512M > /sys/fs/cgroup/congester/memory.max
echo $$ > /sys/fs/cgroup/congester/cgroup.procs
/* generate a lot of diry data on slow HDD */
while true; do dd if=/dev/zero of=/mnt/sdb/zeroes bs=1M count=1024; done &
....
while true; do dd if=/dev/zero of=/mnt/sdb/zeroes bs=1M count=1024; done &
and some job in another cgroup:
mkdir /sys/fs/cgroup/victim
echo 128M > /sys/fs/cgroup/victim/memory.max
# time cat /dev/sda > /dev/null
real 10m15.054s
user 0m0.487s
sys 1m8.505s
According to the tracepoint in wait_iff_congested(), the 'cat' spent 50%
of the time sleeping there.
With the patch, cat don't waste time anymore:
# time cat /dev/sda > /dev/null
real 5m32.911s
user 0m0.411s
sys 0m56.664s
[aryabinin@virtuozzo.com: congestion state should be per-node]
Link: http://lkml.kernel.org/r/20180406135215.10057-1-aryabinin@virtuozzo.com
[ayabinin@virtuozzo.com: make congestion state per-cgroup-per-node instead of just per-cgroup[
Link: http://lkml.kernel.org/r/20180406180254.8970-2-aryabinin@virtuozzo.com
Link: http://lkml.kernel.org/r/20180323152029.11084-5-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Tejun Heo <tj@kernel.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We have separate LRU list for each memory cgroup. Memory reclaim
iterates over cgroups and calls shrink_inactive_list() every inactive
LRU list. Based on the state of a single LRU shrink_inactive_list() may
flag the whole node as dirty,congested or under writeback. This is
obviously wrong and hurtful. It's especially hurtful when we have
possibly small congested cgroup in system. Than *all* direct reclaims
waste time by sleeping in wait_iff_congested(). And the more memcgs in
the system we have the longer memory allocation stall is, because
wait_iff_congested() called on each lru-list scan.
Sum reclaim stats across all visited LRUs on node and flag node as
dirty, congested or under writeback based on that sum. Also call
congestion_wait(), wait_iff_congested() once per pgdat scan, instead of
once per lru-list scan.
This only fixes the problem for global reclaim case. Per-cgroup reclaim
may alter global pgdat flags too, which is wrong. But that is separate
issue and will be addressed in the next patch.
This change will not have any effect on a systems with all workload
concentrated in a single cgroup.
[aryabinin@virtuozzo.com: check nr_writeback against all nr_taken, not just file]
Link: http://lkml.kernel.org/r/20180406180254.8970-1-aryabinin@virtuozzo.com
Link: http://lkml.kernel.org/r/20180323152029.11084-4-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Tejun Heo <tj@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Only kswapd can have non-zero nr_immediate, and current_may_throttle()
is always true for kswapd (PF_LESS_THROTTLE bit is never set) thus it's
enough to check stat.nr_immediate only.
Link: http://lkml.kernel.org/r/20180315164553.17856-4-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Tejun Heo <tj@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Update some comments that became stale since transiton from per-zone to
per-node reclaim.
Link: http://lkml.kernel.org/r/20180315164553.17856-2-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Tejun Heo <tj@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Indirectly reclaimable memory can consume a significant part of total
memory and it's actually reclaimable (it will be released under actual
memory pressure).
So, the overcommit logic should treat it as free.
Otherwise, it's possible to cause random system-wide memory allocation
failures by consuming a significant amount of memory by indirectly
reclaimable memory, e.g. dentry external names.
If overcommit policy GUESS is used, it might be used for denial of
service attack under some conditions.
The following program illustrates the approach. It causes the kernel to
allocate an unreclaimable kmalloc-256 chunk for each stat() call, so
that at some point the overcommit logic may start blocking large
allocation system-wide.
int main()
{
char buf[256];
unsigned long i;
struct stat statbuf;
buf[0] = '/';
for (i = 1; i < sizeof(buf); i++)
buf[i] = '_';
for (i = 0; 1; i++) {
sprintf(&buf[248], "%8lu", i);
stat(buf, &statbuf);
}
return 0;
}
This patch in combination with related indirectly reclaimable memory
patches closes this issue.
Link: http://lkml.kernel.org/r/20180313130041.8078-1-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
I received a report about suspicious growth of unreclaimable slabs on
some machines. I've found that it happens on machines with low memory
pressure, and these unreclaimable slabs are external names attached to
dentries.
External names are allocated using generic kmalloc() function, so they
are accounted as unreclaimable. But they are held by dentries, which
are reclaimable, and they will be reclaimed under the memory pressure.
In particular, this breaks MemAvailable calculation, as it doesn't take
unreclaimable slabs into account. This leads to a silly situation, when
a machine is almost idle, has no memory pressure and therefore has a big
dentry cache. And the resulting MemAvailable is too low to start a new
workload.
To address the issue, the NR_INDIRECTLY_RECLAIMABLE_BYTES counter is
used to track the amount of memory, consumed by external names. The
counter is increased in the dentry allocation path, if an external name
structure is allocated; and it's decreased in the dentry freeing path.
To reproduce the problem I've used the following Python script:
import os
for iter in range (0, 10000000):
try:
name = ("/some_long_name_%d" % iter) + "_" * 220
os.stat(name)
except Exception:
pass
Without this patch:
$ cat /proc/meminfo | grep MemAvailable
MemAvailable: 7811688 kB
$ python indirect.py
$ cat /proc/meminfo | grep MemAvailable
MemAvailable: 2753052 kB
With the patch:
$ cat /proc/meminfo | grep MemAvailable
MemAvailable: 7809516 kB
$ python indirect.py
$ cat /proc/meminfo | grep MemAvailable
MemAvailable: 7749144 kB
[guro@fb.com: fix indirectly reclaimable memory accounting for CONFIG_SLOB]
Link: http://lkml.kernel.org/r/20180312194140.19517-1-guro@fb.com
[guro@fb.com: fix indirectly reclaimable memory accounting]
Link: http://lkml.kernel.org/r/20180313125701.7955-1-guro@fb.com
Link: http://lkml.kernel.org/r/20180305133743.12746-5-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Adjust /proc/meminfo MemAvailable calculation by adding the amount of
indirectly reclaimable memory (rounded to the PAGE_SIZE).
Link: http://lkml.kernel.org/r/20180305133743.12746-4-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patch series "indirectly reclaimable memory", v2.
This patchset introduces the concept of indirectly reclaimable memory
and applies it to fix the issue of when a big number of dentries with
external names can significantly affect the MemAvailable value.
This patch (of 3):
Introduce a concept of indirectly reclaimable memory and adds the
corresponding memory counter and /proc/vmstat item.
Indirectly reclaimable memory is any sort of memory, used by the kernel
(except of reclaimable slabs), which is actually reclaimable, i.e. will
be released under memory pressure.
The counter is in bytes, as it's not always possible to count such
objects in pages. The name contains BYTES by analogy to
NR_KERNEL_STACK_KB.
Link: http://lkml.kernel.org/r/20180305133743.12746-2-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Stefan Hajnoczi says:
====================
vhost: fix vhost_vq_access_ok() log check
v3:
* Rebased onto net/master and resolved conflict [DaveM]
v2:
* Rewrote the conditional to make the vq access check clearer [Linus]
* Added Patch 2 to make the return type consistent and harder to misuse [Linus]
The first patch fixes the vhost virtqueue access check which was recently
broken. The second patch replaces the int return type with bool to prevent
future bugs.
====================
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently vhost *_access_ok() functions return int. This is error-prone
because there are two popular conventions:
1. 0 means failure, 1 means success
2. -errno means failure, 0 means success
Although vhost mostly uses #1, it does not do so consistently.
umem_access_ok() uses #2.
This patch changes the return type from int to bool so that false means
failure and true means success. This eliminates a potential source of
errors.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit d65026c6c6 ("vhost: validate log
when IOTLB is enabled") introduced a regression. The logic was
originally:
if (vq->iotlb)
return 1;
return A && B;
After the patch the short-circuit logic for A was inverted:
if (A || vq->iotlb)
return A;
return B;
This patch fixes the regression by rewriting the checks in the obvious
way, no longer returning A when vq->iotlb is non-NULL (which is hard to
understand).
Reported-by: syzbot+65a84dde0214b0387ccd@syzkaller.appspotmail.com
Cc: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
vhost_copy_to_user is used to copy vring used elements to userspace.
We should use VHOST_ADDR_USED instead of VHOST_ADDR_DESC.
Fixes: f889491380 ("vhost: introduce O(1) vq metadata cache")
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Igor Russkikh says:
====================
Aquantia atlantic critical fixes 04/2018
Two regressions on latest 4.16 driver reported by users
Some of old FW (1.5.44) had a link management logic which prevents
driver to make clean reset. Driver of 4.16 has a full hardware reset
implemented and that broke the link and traffic on such a cards.
Second is oops on shutdown callback in case interface is already
closed or was never opened.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
In case netdev is closed at the moment of pci shutdown, aq_nic_stop
gets called second time. napi_disable in that case hangs indefinitely.
In other case, if device was never opened at all, we get oops because
of null pointer access.
We should invoke aq_nic_stop conditionally, only if device is running
at the moment of shutdown.
Reported-by: David Arcari <darcari@redhat.com>
Fixes: 90869ddfef ("net: aquantia: Implement pci shutdown callback")
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
On ASUS XG-C100C with 1.5.44 firmware a special mode called "dirty wake"
is active. With this mode when motherboard gets powered (but no poweron
happens yet), NIC automatically enables powersave link and watches
for WOL packet.
This normally allows to powerup the PC after AC power failures.
Not all motherboards or bios settings gives power to PCI slots,
so this mode is not enabled on all the hardware.
4.16 linux driver introduced full hardware reset sequence
This is required since before that we had no NIC hardware
reset implemented and there were side effects of "not clean start".
But this full reset is incompatible with "dirty wake" WOL feature
it keeps the PHY link in a special mode forever. As a consequence,
driver sees no link and no traffic.
To fix this we forcibly change FW state to idle state before doing
the full reset. This makes FW to restore link state.
Fixes: c8c82eb net: aquantia: Introduce global AQC hardware reset sequence
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The Cinterion AHS8 is a 3G device with one embedded WWAN interface
using cdc_ether as a driver.
The modem is controlled via AT commands through the exposed TTYs.
AT+CGDCONT write command can be used to activate or deactivate a WWAN
connection for a PDP context defined with the same command. UE
supports one WWAN adapter.
Signed-off-by: Bassem Boubaker <bassem.boubaker@actia.fr>
Acked-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
On receiving a packet the state index points to the rstate which must be
used to fill up IP and TCP headers. But if the state index points to a
rstate which is unitialized, i.e. filled with zeros, it gets stuck in an
infinite loop inside ip_fast_csum trying to compute the ip checsum of a
header with zero length.
89.666953: <2> [<ffffff9dd3e94d38>] slhc_uncompress+0x464/0x468
89.666965: <2> [<ffffff9dd3e87d88>] ppp_receive_nonmp_frame+0x3b4/0x65c
89.666978: <2> [<ffffff9dd3e89dd4>] ppp_receive_frame+0x64/0x7e0
89.666991: <2> [<ffffff9dd3e8a708>] ppp_input+0x104/0x198
89.667005: <2> [<ffffff9dd3e93868>] pppopns_recv_core+0x238/0x370
89.667027: <2> [<ffffff9dd4428fc8>] __sk_receive_skb+0xdc/0x250
89.667040: <2> [<ffffff9dd3e939e4>] pppopns_recv+0x44/0x60
89.667053: <2> [<ffffff9dd4426848>] __sock_queue_rcv_skb+0x16c/0x24c
89.667065: <2> [<ffffff9dd4426954>] sock_queue_rcv_skb+0x2c/0x38
89.667085: <2> [<ffffff9dd44f7358>] raw_rcv+0x124/0x154
89.667098: <2> [<ffffff9dd44f7568>] raw_local_deliver+0x1e0/0x22c
89.667117: <2> [<ffffff9dd44c8ba0>] ip_local_deliver_finish+0x70/0x24c
89.667131: <2> [<ffffff9dd44c92f4>] ip_local_deliver+0x100/0x10c
./scripts/faddr2line vmlinux slhc_uncompress+0x464/0x468 output:
ip_fast_csum at arch/arm64/include/asm/checksum.h:40
(inlined by) slhc_uncompress at drivers/net/slip/slhc.c:615
Adding a variable to indicate if the current rstate is initialized. If
such a packet arrives, move to toss state.
Signed-off-by: Tejaswi Tanikella <tejaswit@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
lan78xx_defer_event generates an error message whenever the work item
is already scheduled. lan78xx_open defers three events -
EVENT_STAT_UPDATE, EVENT_DEV_OPEN and EVENT_LINK_RESET. Being aware
of the likelihood (or certainty) of an error message, the DEV_OPEN
event is added to the set of pending events directly, relying on
the subsequent deferral of the EVENT_LINK_RESET call to schedule the
work. Take the same precaution with EVENT_STAT_UPDATE to avoid a
totally unnecessary error message.
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
lan78xx_read_otp tries to return -EINVAL in the event of invalid OTP
content, but the value gets overwritten before it is returned and the
read goes ahead anyway. Make the read conditional as it should be
and preserve the error code.
Fixes: 55d7de9de6 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver")
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
rds_sendmsg() calls rds_send_mprds_hash() to find a c_path to use to
send a message. Suppose the RDS connection is not yet up. In
rds_send_mprds_hash(), it does
if (conn->c_npaths == 0)
wait_event_interruptible(conn->c_hs_waitq,
(conn->c_npaths != 0));
If it is interrupted before the connection is set up,
rds_send_mprds_hash() will return a non-zero hash value. Hence
rds_sendmsg() will use a non-zero c_path to send the message. But if
the RDS connection ends up to be non-MP capable, the message will be
lost as only the zero c_path can be used.
Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
* pm-cpuidle:
tick-sched: avoid a maybe-uninitialized warning
cpuidle: Add definition of residency to sysfs documentation
time: hrtimer: Use timerqueue_iterate_next() to get to the next timer
nohz: Avoid duplication of code related to got_idle_tick
nohz: Gather tick_sched booleans under a common flag field
cpuidle: menu: Avoid selecting shallow states with stopped tick
cpuidle: menu: Refine idle state selection for running tick
sched: idle: Select idle state before stopping the tick
time: hrtimer: Introduce hrtimer_next_event_without()
time: tick-sched: Split tick_nohz_stop_sched_tick()
cpuidle: Return nohz hint from cpuidle_select()
jiffies: Introduce USER_TICK_USEC and redefine TICK_USEC
sched: idle: Do not stop the tick before cpuidle_idle_call()
sched: idle: Do not stop the tick upfront in the idle loop
time: tick-sched: Reorganize idle tick management code
* pm-qos:
PM / QoS: mark expected switch fall-throughs
I am interested in all ASPEED drivers, and the previous match wasn't
grabbing files in nested directories. Use N instead.
Add the arm kernel mailing list so that patches get reviewed there, and
the linux-aspeed list which exists only so I can use patchwork to track
patches.
Add Andrew as a reviewer, because he is involved in reviewing ASPEED
stuff.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
The code refactoring by commit 0176adb004 ("swiotlb: refactor coherent
buffer allocation") made swiotlb_alloc_buffer almost always failing due
to a thinko: namely, the function evaluates the dma_coherent_ok call
incorrectly and dealing as if it's invalid. This ends up with weird
errors like iwlwifi probe failure or amdgpu screen flickering.
This patch corrects the logic error.
Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=1088658
Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=1088902
Fixes: 0176adb004 ("swiotlb: refactor coherent buffer allocation")
Cc: <stable@vger.kernel.org> # v4.16+
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
- support for rbd "fancy" striping (myself). The striping feature bit
is now fully implemented, allowing mapping v2 images with non-default
striping patterns. This completes support for --image-format 2.
- CephFS quota support (Luis Henriques and Zheng Yan). This set is
based on the new SnapRealm code in the upcoming v13.y.z ("Mimic")
release. Quota handling will be rejected on older filesystems.
- memory usage improvements in CephFS (Chengguang Xu). Directory
specific bits have been split out of ceph_file_info and some effort
went into improving cap reservation code to avoid OOM crashes.
Also included a bunch of assorted fixes all over the place from
Chengguang and others.
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Merge tag 'ceph-for-4.17-rc1' of git://github.com/ceph/ceph-client
Pull ceph updates from Ilya Dryomov:
"The big ticket items are:
- support for rbd "fancy" striping (myself).
The striping feature bit is now fully implemented, allowing mapping
v2 images with non-default striping patterns. This completes
support for --image-format 2.
- CephFS quota support (Luis Henriques and Zheng Yan).
This set is based on the new SnapRealm code in the upcoming v13.y.z
("Mimic") release. Quota handling will be rejected on older
filesystems.
- memory usage improvements in CephFS (Chengguang Xu).
Directory specific bits have been split out of ceph_file_info and
some effort went into improving cap reservation code to avoid OOM
crashes.
Also included a bunch of assorted fixes all over the place from
Chengguang and others"
* tag 'ceph-for-4.17-rc1' of git://github.com/ceph/ceph-client: (67 commits)
ceph: quota: report root dir quota usage in statfs
ceph: quota: add counter for snaprealms with quota
ceph: quota: cache inode pointer in ceph_snap_realm
ceph: fix root quota realm check
ceph: don't check quota for snap inode
ceph: quota: update MDS when max_bytes is approaching
ceph: quota: support for ceph.quota.max_bytes
ceph: quota: don't allow cross-quota renames
ceph: quota: support for ceph.quota.max_files
ceph: quota: add initial infrastructure to support cephfs quotas
rbd: remove VLA usage
rbd: fix spelling mistake: "reregisteration" -> "reregistration"
ceph: rename function drop_leases() to a more descriptive name
ceph: fix invalid point dereference for error case in mdsc destroy
ceph: return proper bool type to caller instead of pointer
ceph: optimize memory usage
ceph: optimize mds session register
libceph, ceph: add __init attribution to init funcitons
ceph: filter out used flags when printing unused open flags
ceph: don't wait on writeback when there is no more dirty pages
...
Dell SMBIOS driver fixed against memory leaks.
The fujitsu-laptop driver is cleaned up and now supports hotkeys for
Lifebook U7x7 models. Besides that the typo introduced by one of
previous clean up series has been fixed.
Specific to x86-based laptops HID device now supports
KEY_ROTATE_LOCK_TOGGLE event which is emitted, for example,
by Wacom MobileStudio Pro 13.
Turbo MAX 3 technology is enabled for the rest of platforms that support
Hardware-P-States feature which have core priority described by
ACPI CPPC table.
Mellanox on x86 gets better support of I2C bus in use including support
of hotpluggable ones.
Silead touchscreen is enabled on two tablet models, i.e Yours Y8W81 and
I.T.Works TW701.
From now on the second fan on Thinkpad P50 is supported.
The topstar-laptop driver is reworked to support new models, in
particular Topstar U931.
Some of the changes had been already applied during v4.16 cycle and thus
have a duplication here:
- 027d50ccd6 platform/x86: intel-vbtn: Only activate tablet mode switch on 2-in-1's
- 250b044e1a platform/x86: intel-vbtn: Reset wakeup capable flag on removal
- 356b57752c platform/x86: intel-hid: Reset wakeup capable flag on removal
- 501f7e52de platform/x86: wmi: Fix misuse of vsprintf extension %pULL
- 98c76a3904 platform/x86: dell-smbios: Correct some style warnings
- ec34fe3859 platform/x86: dell-smbios: Rename dell-smbios source to dell-smbios-bae
- 41e36f2f85 platform/x86: dell-smbios: Link all dell-smbios-* modules together
- c715e43455 platform/x86: Allow for SMBIOS backend defaults
- cc69c88fbe platform/x86: dell-smbios: Resolve dependency error on DCDBAS
- 4716007c23 platform/x86: dell-smbios: Resolve dependency error on ACPI_WMI
- 7129707ec2 platform/x86: Fix dell driver init order
The following is an automated git shortlog grouped by driver:
dell-smbios:
- Fix memory leaks in build_tokens_sysfs()
- Fix dell driver init order
- Resolve dependency error on ACPI_WMI
- Resolve dependency error on DCDBAS
- Allow for SMBIOS backend defaults
- Link all dell-smbios-* modules together
- Rename dell-smbios source to dell-smbios-base
- Correct some style warnings
fujitsu-laptop:
- Support Lifebook U7x7 hotkeys
- Revert UNSUPPORTED_CMD back to an int
- Clean up constants
- Define constants for backlight power control
- Do not include linux/slab.h
- Clearly distinguish module parameters
- Simplify error paths
- Defer input device registration
- Unify local variable naming
GPD pocket fan:
- fix spelling mistake: "Mill-celcius" -> "millicelsius"
intel-hid:
- support KEY_ROTATE_LOCK_TOGGLE
- clean up and sort header files
- Reset wakeup capable flag on removal
intel_turbo_max_3:
- Remove restriction for HWP platforms
intel-vbtn:
- Reset wakeup capable flag on removal
- Only activate tablet mode switch on 2-in-1's
mlx-platform:
- Add physical bus number auto detection
- Add deffered bus functionality
- Use define for the channel numbers
platform/mellanox:
- mlxreg-hotplug: Change input for device create routine
silead_dmi:
- Add entry for the Yours Y8W81 tablet
- Add DMI match for the I.T.Works TW701 tablet
thinkpad_acpi:
- Add 2nd Fan Support for Thinkpad P50
topstar-laptop:
- replace licence text with SPDX tag
- update copyright and fix some comments
- add Topstar U931/RVP7 WLAN LED workaround
- add platform device
- split ACPI events and input handling
- use consistent naming scheme
- revert "convert to module_acpi_driver()"
wmi:
- Fix misuse of vsprintf extension %pULL
- Replace list_for_each() by list_for_each_entry()
- Replace kmalloc + sprintf() with kasprintf()
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Merge tag 'platform-drivers-x86-v4.17-1' of git://git.infradead.org/linux-platform-drivers-x86
Pull x86 platform driver updates from Andy Shevchenko:
- Dell SMBIOS driver fixed against memory leaks.
- The fujitsu-laptop driver is cleaned up and now supports hotkeys for
Lifebook U7x7 models. Besides that the typo introduced by one of
previous clean up series has been fixed.
- Specific to x86-based laptops HID device now supports
KEY_ROTATE_LOCK_TOGGLE event which is emitted, for example, by Wacom
MobileStudio Pro 13.
- Turbo MAX 3 technology is enabled for the rest of platforms that
support Hardware-P-States feature which have core priority described
by ACPI CPPC table.
- Mellanox on x86 gets better support of I2C bus in use including
support of hotpluggable ones.
- Silead touchscreen is enabled on two tablet models, i.e Yours Y8W81
and I.T.Works TW701.
- From now on the second fan on Thinkpad P50 is supported.
- The topstar-laptop driver is reworked to support new models, in
particular Topstar U931.
* tag 'platform-drivers-x86-v4.17-1' of git://git.infradead.org/linux-platform-drivers-x86: (41 commits)
platform/x86: thinkpad_acpi: Add 2nd Fan Support for Thinkpad P50
platform/x86: dell-smbios: Fix memory leaks in build_tokens_sysfs()
intel-hid: support KEY_ROTATE_LOCK_TOGGLE
intel-hid: clean up and sort header files
platform/x86: silead_dmi: Add entry for the Yours Y8W81 tablet
platform/x86: fujitsu-laptop: Support Lifebook U7x7 hotkeys
platform/x86: mlx-platform: Add physical bus number auto detection
platform/mellanox: mlxreg-hotplug: Change input for device create routine
platform/x86: mlx-platform: Add deffered bus functionality
platform/x86: mlx-platform: Use define for the channel numbers
platform/x86: fujitsu-laptop: Revert UNSUPPORTED_CMD back to an int
platform/x86: Fix dell driver init order
platform/x86: dell-smbios: Resolve dependency error on ACPI_WMI
platform/x86: dell-smbios: Resolve dependency error on DCDBAS
platform/x86: Allow for SMBIOS backend defaults
platform/x86: dell-smbios: Link all dell-smbios-* modules together
platform/x86: dell-smbios: Rename dell-smbios source to dell-smbios-base
platform/x86: dell-smbios: Correct some style warnings
platform/x86: wmi: Fix misuse of vsprintf extension %pULL
platform/x86: intel-hid: Reset wakeup capable flag on removal
...
This time we have couple of new drivers along with updates to drivers.
- new driver for DesignWare AXI DMAC and MediaTek High-Speed DMA controller
- stm32 dma and qcom bam dma driver updates
- norandom test option for dmatest
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Merge tag 'dmaengine-4.17-rc1' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
"This time we have couple of new drivers along with updates to drivers:
- new drivers for the DesignWare AXI DMAC and MediaTek High-Speed DMA
controllers
- stm32 dma and qcom bam dma driver updates
- norandom test option for dmatest"
* tag 'dmaengine-4.17-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (30 commits)
dmaengine: stm32-dma: properly mask irq bits
dmaengine: stm32-dma: fix max items per transfer
dmaengine: stm32-dma: fix DMA IRQ status handling
dmaengine: stm32-dma: Improve memory burst management
dmaengine: stm32-dma: fix typo and reported checkpatch warnings
dmaengine: stm32-dma: fix incomplete configuration in cyclic mode
dmaengine: stm32-dma: threshold manages with bitfield feature
dt-bindings: stm32-dma: introduce DMA features bitfield
dt-bindings: rcar-dmac: Document r8a77470 support
dmaengine: rcar-dmac: Fix too early/late system suspend/resume callbacks
dmaengine: dw-axi-dmac: fix spelling mistake: "catched" -> "caught"
dmaengine: edma: Check the memory allocation for the memcpy dma device
dmaengine: at_xdmac: fix rare residue corruption
dmaengine: mediatek: update MAINTAINERS entry with MediaTek DMA driver
dmaengine: mediatek: Add MediaTek High-Speed DMA controller for MT7622 and MT7623 SoC
dt-bindings: dmaengine: Add MediaTek High-Speed DMA controller bindings
dt-bindings: Document the Synopsys DW AXI DMA bindings
dmaengine: Introduce DW AXI DMAC driver
dmaengine: pl330: fix a race condition in case of threaded irqs
dmaengine: imx-sdma: fix pagefault when channel is disabled during interrupt
...
This adds support for generating coredumps for remoteprocs using
devcoredump, adds the Qualcomm sysmon driver for intra-remoteproc crash
handling and a number of fixes in Qualcomm and IMX drivers.
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Merge tag 'rproc-v4.17' of git://github.com/andersson/remoteproc
Pull remoteproc updates from Bjorn Andersson:
- add support for generating coredumps for remoteprocs using
devcoredump
- add the Qualcomm sysmon driver for intra-remoteproc crash handling
- a number of fixes in Qualcomm and IMX drivers
* tag 'rproc-v4.17' of git://github.com/andersson/remoteproc:
remoteproc: fix null pointer dereference on glink only platforms
soc: qcom: qmi: add CONFIG_NET dependency
remoteproc: imx_rproc: Slightly simplify code in 'imx_rproc_probe()'
remoteproc: imx_rproc: Re-use existing error handling path in 'imx_rproc_probe()'
remoteproc: imx_rproc: Fix an error handling path in 'imx_rproc_probe()'
samples: Introduce Qualcomm QMI sample client
remoteproc: qcom: Introduce sysmon
remoteproc: Pass type of shutdown to subdev remove
remoteproc: qcom: Register segments for core dump
soc: qcom: mdt-loader: Return relocation base
remoteproc: Rename "load_rsc_table" to "parse_fw"
remoteproc: Add remote processor coredump support
remoteproc: Remove null character write of shared mem
This transitions the rpmsg_trysend() code paths of SMD and GLINK to use
non-sleeping locks, it reverts the overly optimistic handling of
discovered SMD channels and fixes an issue in SMD where incoming
messages races with the probing of a client driver.
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Merge tag 'rpmsg-v4.17' of git://github.com/andersson/remoteproc
Pull rpmsg updates from Bjorn Andersson:
- transition the rpmsg_trysend() code paths of SMD and GLINK to use
non-sleeping locks
- revert the overly optimistic handling of discovered SMD channels
- fix an issue in SMD where incoming messages race with the probing of
a client driver
* tag 'rpmsg-v4.17' of git://github.com/andersson/remoteproc:
rpmsg: smd: Use announce_create to process any receive work
rpmsg: Only invoke announce_create for rpdev with endpoints
rpmsg: smd: Fix container_of macros
Revert "rpmsg: smd: Create device for all channels"
rpmsg: glink: Use spinlock in tx path
rpmsg: smd: Use spinlock in tx path
rpmsg: smd: use put_device() if device_register fail
rpmsg: glink: use put_device() if device_register fail
These are the main MIPS changes for 4.17. Rough overview:
(1) generic platform: Add support for Microsemi Ocelot SoCs
(2) crypto: Add CRC32 and CRC32C HW acceleration module
(3) Various cleanups and misc improvements
Miscellaneous:
- Hang more efficiently on halt/powerdown/restart
- pm-cps: Block system suspend when a JTAG probe is present
- Expand make help text for generic defconfigs
- Refactor handling of legacy defconfigs
- Determine the entry point from the ELF file header to fix microMIPS
for certain toolchains
- Introduce isa-rev.h for MIPS_ISA_REV and use to simplify other code
Minor cleanups:
- DTS: boston/ci20: Unit name cleanups and correction
- kdump: Make the default for PHYSICAL_START always 64-bit
- Constify gpio_led in Alchemy, AR7, and TXX9
- Silence a couple of W=1 warnings
- Remove duplicate includes
Platform support:
ath79:
- Fix AR724X_PLL_REG_PCIE_CONFIG offset
BCM47xx:
- FIRMWARE: Use mac_pton() for MAC address parsing
- Add Luxul XAP1500/XWR1750 WiFi LEDs
- Use standard reset button for Luxul XWR-1750
BMIPS:
- Enable CONFIG_BRCMSTB_PM in bmips_stb_defconfig for build coverage
- Add STB PM, wake-up timer, watchdog DT nodes
Generic platform:
- Add support for Microsemi Ocelot
- dt-bindings: Add vendor prefix for Microsemi Corporation
- dt-bindings: Add bindings for Microsemi SoCs
- Add ocelot SoC & PCB123 board DTS files
- MAINTAINERS: Add entry for Microsemi MIPS SoCs
- Enable crc32-mips on r6 configs
Octeon:
- Drop '.' after newlines in printk calls
ralink:
- pci-mt7621: Enable PCIe on MT7688
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Merge tag 'mips_4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips
Pull MIPS updates from James Hogan:
"These are the main MIPS changes for 4.17. Rough overview:
(1) generic platform: Add support for Microsemi Ocelot SoCs
(2) crypto: Add CRC32 and CRC32C HW acceleration module
(3) Various cleanups and misc improvements
More detailed summary:
Miscellaneous:
- hang more efficiently on halt/powerdown/restart
- pm-cps: Block system suspend when a JTAG probe is present
- expand make help text for generic defconfigs
- refactor handling of legacy defconfigs
- determine the entry point from the ELF file header to fix microMIPS
for certain toolchains
- introduce isa-rev.h for MIPS_ISA_REV and use to simplify other code
Minor cleanups:
- DTS: boston/ci20: Unit name cleanups and correction
- kdump: Make the default for PHYSICAL_START always 64-bit
- constify gpio_led in Alchemy, AR7, and TXX9
- silence a couple of W=1 warnings
- remove duplicate includes
Platform support:
Generic platform:
- add support for Microsemi Ocelot
- dt-bindings: Add vendor prefix for Microsemi Corporation
- dt-bindings: Add bindings for Microsemi SoCs
- add ocelot SoC & PCB123 board DTS files
- MAINTAINERS: Add entry for Microsemi MIPS SoCs
- enable crc32-mips on r6 configs
ath79:
- fix AR724X_PLL_REG_PCIE_CONFIG offset
BCM47xx:
- firmware: Use mac_pton() for MAC address parsing
- add Luxul XAP1500/XWR1750 WiFi LEDs
- use standard reset button for Luxul XWR-1750
BMIPS:
- enable CONFIG_BRCMSTB_PM in bmips_stb_defconfig for build coverage
- add STB PM, wake-up timer, watchdog DT nodes
Octeon:
- drop '.' after newlines in printk calls
ralink:
- pci-mt7621: Enable PCIe on MT7688"
* tag 'mips_4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips: (37 commits)
MIPS: BCM47XX: Use standard reset button for Luxul XWR-1750
MIPS: BCM47XX: Add Luxul XAP1500/XWR1750 WiFi LEDs
MIPS: Make the default for PHYSICAL_START always 64-bit
MIPS: Use the entry point from the ELF file header
MAINTAINERS: Add entry for Microsemi MIPS SoCs
MIPS: generic: Add support for Microsemi Ocelot
MIPS: mscc: Add ocelot PCB123 device tree
MIPS: mscc: Add ocelot dtsi
dt-bindings: mips: Add bindings for Microsemi SoCs
dt-bindings: Add vendor prefix for Microsemi Corporation
MIPS: ath79: Fix AR724X_PLL_REG_PCIE_CONFIG offset
MIPS: pci-mt7620: Enable PCIe on MT7688
MIPS: pm-cps: Block system suspend when a JTAG probe is present
MIPS: VDSO: Replace __mips_isa_rev with MIPS_ISA_REV
MIPS: BPF: Replace __mips_isa_rev with MIPS_ISA_REV
MIPS: cpu-features.h: Replace __mips_isa_rev with MIPS_ISA_REV
MIPS: Introduce isa-rev.h to define MIPS_ISA_REV
MIPS: Hang more efficiently on halt/powerdown/restart
FIRMWARE: bcm47xx_nvram: Replace mac address parsing
MIPS: BMIPS: Add Broadcom STB watchdog nodes
...
- Tom Zanussi's extended histogram work
This adds the synthetic events to have histograms from multiple event data
Adds triggers "onmatch" and "onmax" to call the synthetic events
Several updates to the histogram code from this
- Allow way to nest ring buffer calls in the same context
- Allow absolute time stamps in ring buffer
- Rewrite of filter code parsing based on Al Viro's suggestions
- Setting of trace_clock to global if TSC is unstable (on boot)
- Better OOM handling when allocating large ring buffers
- Added initcall tracepoints (consolidated initcall_debug code with them)
And other various fixes and clean ups
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Merge tag 'trace-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
"New features:
- Tom Zanussi's extended histogram work.
This adds the synthetic events to have histograms from multiple
event data Adds triggers "onmatch" and "onmax" to call the
synthetic events Several updates to the histogram code from this
- Allow way to nest ring buffer calls in the same context
- Allow absolute time stamps in ring buffer
- Rewrite of filter code parsing based on Al Viro's suggestions
- Setting of trace_clock to global if TSC is unstable (on boot)
- Better OOM handling when allocating large ring buffers
- Added initcall tracepoints (consolidated initcall_debug code with
them)
And other various fixes and clean ups"
* tag 'trace-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (68 commits)
init: Have initcall_debug still work without CONFIG_TRACEPOINTS
init, tracing: Have printk come through the trace events for initcall_debug
init, tracing: instrument security and console initcall trace events
init, tracing: Add initcall trace events
tracing: Add rcu dereference annotation for test func that touches filter->prog
tracing: Add rcu dereference annotation for filter->prog
tracing: Fixup logic inversion on setting trace_global_clock defaults
tracing: Hide global trace clock from lockdep
ring-buffer: Add set/clear_current_oom_origin() during allocations
ring-buffer: Check if memory is available before allocation
lockdep: Add print_irqtrace_events() to __warn
vsprintf: Do not preprocess non-dereferenced pointers for bprintf (%px and %pK)
tracing: Uninitialized variable in create_tracing_map_fields()
tracing: Make sure variable string fields are NULL-terminated
tracing: Add action comparisons when testing matching hist triggers
tracing: Don't add flag strings when displaying variable references
tracing: Fix display of hist trigger expressions containing timestamps
ftrace: Drop a VLA in module_exists()
tracing: Mention trace_clock=global when warning about unstable clocks
tracing: Default to using trace_global_clock if sched_clock is unstable
...
Export the number of successful and failed hugetlb page
allocations via the virtio balloon driver. These 2 counts
come directly from the vm_events HTLB_BUDDY_PGALLOC and
HTLB_BUDDY_PGALLOC_FAIL.
Signed-off-by: Jonathan Helman <jonathan.helman@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
* A rework of the filesytem-dax implementation provides for detection of
unmap operations (truncate / hole punch) colliding with in-progress
device-DMA. A fix for these collisions remains a work-in-progress
pending resolution of truncate latency and starvation regressions.
* The of_pmem driver expands the users of libnvdimm outside of x86 and
ACPI to describe an implementation of persistent memory on PowerPC with
Open Firmware / Device tree.
* Address Range Scrub (ARS) handling is completely rewritten to account for
the fact that ARS may run for 100s of seconds and there is no platform
defined way to cancel it. ARS will now no longer block namespace
initialization.
* The NVDIMM Namespace Label implementation is updated to handle label
areas as small as 1K, down from 128K.
* Miscellaneous cleanups and updates to unit test infrastructure.
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Merge tag 'libnvdimm-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm updates from Dan Williams:
"This cycle was was not something I ever want to repeat as there were
several late changes that have only now just settled.
Half of the branch up to commit d2c997c0f1 ("fs, dax: use
page->mapping to warn...") have been in -next for several releases.
The of_pmem driver and the address range scrub rework were late
arrivals, and the dax work was scaled back at the last moment.
The of_pmem driver missed a previous merge window due to an oversight.
A sense of obligation to rectify that miss is why it is included for
4.17. It has acks from PowerPC folks. Stephen reported a build failure
that only occurs when merging it with your latest tree, for now I have
fixed that up by disabling modular builds of of_pmem. A test merge
with your tree has received a build success report from the 0day robot
over 156 configs.
An initial version of the ARS rework was submitted before the merge
window. It is self contained to libnvdimm, a net code reduction, and
passing all unit tests.
The filesystem-dax changes are based on the wait_var_event()
functionality from tip/sched/core. However, late review feedback
showed that those changes regressed truncate performance to a large
degree. The branch was rewound to drop the truncate behavior change
and now only includes preparation patches and cleanups (with full acks
and reviews). The finalization of this dax-dma-vs-trnucate work will
need to wait for 4.18.
Summary:
- A rework of the filesytem-dax implementation provides for detection
of unmap operations (truncate / hole punch) colliding with
in-progress device-DMA. A fix for these collisions remains a
work-in-progress pending resolution of truncate latency and
starvation regressions.
- The of_pmem driver expands the users of libnvdimm outside of x86
and ACPI to describe an implementation of persistent memory on
PowerPC with Open Firmware / Device tree.
- Address Range Scrub (ARS) handling is completely rewritten to
account for the fact that ARS may run for 100s of seconds and there
is no platform defined way to cancel it. ARS will now no longer
block namespace initialization.
- The NVDIMM Namespace Label implementation is updated to handle
label areas as small as 1K, down from 128K.
- Miscellaneous cleanups and updates to unit test infrastructure"
* tag 'libnvdimm-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (39 commits)
libnvdimm, of_pmem: workaround OF_NUMA=n build error
nfit, address-range-scrub: add module option to skip initial ars
nfit, address-range-scrub: rework and simplify ARS state machine
nfit, address-range-scrub: determine one platform max_ars value
powerpc/powernv: Create platform devs for nvdimm buses
doc/devicetree: Persistent memory region bindings
libnvdimm: Add device-tree based driver
libnvdimm: Add of_node to region and bus descriptors
libnvdimm, region: quiet region probe
libnvdimm, namespace: use a safe lookup for dimm device name
libnvdimm, dimm: fix dpa reservation vs uninitialized label area
libnvdimm, testing: update the default smart ctrl_temperature
libnvdimm, testing: Add emulation for smart injection commands
nfit, address-range-scrub: introduce nfit_spa->ars_state
libnvdimm: add an api to cast a 'struct nd_region' to its 'struct device'
nfit, address-range-scrub: fix scrub in-progress reporting
dax, dm: allow device-mapper to operate without dax support
dax: introduce CONFIG_DAX_DRIVER
fs, dax: use page->mapping to warn if truncate collides with a busy page
ext2, dax: introduce ext2_dax_aops
...
Subsystem:
- Add tracepoints
- Rework of the RTC/nvmem API to allow drivers to discard struct nvmem_config
after registration
- New range API, drivers can now expose the useful range of the RTC
- New offset API the core is now able to add an offset to the RTC time,
modifying the supported range.
- Multiple rtc_time64_to_tm fixes
- Handle time_t overflow on 32 bit platforms in the core instead of letting
drivers do crazy things.
- remove rtc_control API
New driver:
- Intersil ISL12026
Drivers:
- Drivers exposing the RTC non volatile memory have been converted to use nvmem
- Removed useless time and date validation
- Removed an indirection pattern that was a cargo cult from ancient drivers
- Removed VLA usage
- Fixed a possible race condition in probe functions
- AB8540 support is dropped from ab8500
- pcf85363 now has alarm support
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Merge tag 'rtc-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni:
"This contains a few series that have been in preparation for a while
and that will help systems with RTCs that will fail in 2038, 2069 or
2100.
Subsystem:
- Add tracepoints
- Rework of the RTC/nvmem API to allow drivers to discard struct
nvmem_config after registration
- New range API, drivers can now expose the useful range of the RTC
- New offset API the core is now able to add an offset to the RTC
time, modifying the supported range.
- Multiple rtc_time64_to_tm fixes
- Handle time_t overflow on 32 bit platforms in the core instead of
letting drivers do crazy things.
- remove rtc_control API
New driver:
- Intersil ISL12026
Drivers:
- Drivers exposing the RTC non volatile memory have been converted to
use nvmem
- Removed useless time and date validation
- Removed an indirection pattern that was a cargo cult from ancient
drivers
- Removed VLA usage
- Fixed a possible race condition in probe functions
- AB8540 support is dropped from ab8500
- pcf85363 now has alarm support"
* tag 'rtc-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (128 commits)
rtc: snvs: Fix usage of snvs_rtc_enable
rtc: mt7622: fix module autoloading for OF platform drivers
rtc: isl12022: use true and false for boolean values
rtc: ab8500: Drop AB8540 support
rtc: remove a warning during scripts/kernel-doc step
rtc: 88pm860x: remove artificial limitation
rtc: 88pm80x: remove artificial limitation
rtc: st-lpc: remove artificial limitation
rtc: mrst: remove artificial limitation
rtc: mv: remove artificial limitation
rtc: hctosys: Ensure system time doesn't overflow time_t
parisc: time: stop validating rtc_time in .read_time
rtc: pcf85063: fix clearing bits in pcf85063_start_clock
rtc: at91sam9: Set name of regmap_config
rtc: s5m: Remove VLA usage
rtc: s5m: Move enum from rtc.h to rtc-s5m.c
rtc: remove VLA usage
rtc: Add useful timestamp definitions
rtc: Add one offset seconds to expand RTC range
rtc: Factor out the RTC range validation into rtc_valid_range()
...
