AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/lib
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Dan Williams 795ee30648 lib/genalloc: introduce chunk owners 
The p2pdma facility enables a provider to publish a pool of dma
addresses for a consumer to allocate.  A genpool is used internally by
p2pdma to collect dma resources, 'chunks', to be handed out to
consumers.  Whenever a consumer allocates a resource it needs to pin the
'struct dev_pagemap' instance that backs the chunk selected by
pci_alloc_p2pmem().

Currently that reference is taken globally on the entire provider
device.  That sets up a lifetime mismatch whereby the p2pdma core needs
to maintain hacks to make sure the percpu_ref is not released twice.

This lifetime mismatch also stands in the way of a fix to
devm_memremap_pages() whereby devm_memremap_pages_release() must wait for
the percpu_ref ->release() callback to complete before it can proceed to
teardown pages.

So, towards fixing this situation, introduce the ability to store a 'chunk
owner' at gen_pool_add() time, and a facility to retrieve the owner at
gen_pool_{alloc,free}() time.  For p2pdma this will be used to store and
recall individual dev_pagemap reference counter instances per-chunk.

Link: http://lkml.kernel.org/r/155727338118.292046.13407378933221579644.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-13 17:34:56 -10:00
..
842 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
fonts treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
livepatch livepatch: Proper error handling in the shadow variables selftest 2019-02-06 11:01:57 +01:00
lz4 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
lzo treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
math treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mpi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 26 2019-05-24 17:27:10 +02:00
raid6 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
reed_solomon treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
xz treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
zlib_deflate treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
zlib_inflate treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
zstd treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
.gitignore
argv_split.c
ashldi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
ashrdi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
asn1_decoder.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
assoc_array.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
atomic64_test.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
atomic64.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
audit.c
bcd.c
bch.c
bitmap.c lib: rework bitmap_parselist 2019-05-14 19:52:49 -07:00
bitrev.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
bsearch.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 372 2019-06-05 17:37:10 +02:00
btree.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 431 2019-06-05 17:37:16 +02:00
bucket_locks.c
bug.c
build_OID_registry treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
bust_spinlocks.c
chacha.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
check_signature.c
checksum.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
clz_ctz.c
clz_tab.c
cmdline.c lib/cmdline.c: mark expected switch fall-throughs 2019-04-08 18:39:23 -05:00
cmpdi2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
compat_audit.c
cpu_rmap.c
cpumask.c treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
crc4.c
crc7.c
crc8.c
crc16.c
crc32.c lib/crc32.c: mark crc32_le_base/__crc32c_le_base aliases as __pure 2019-02-15 19:50:07 +01:00
crc32defs.h
crc32test.c
crc64.c
crc-ccitt.c
crc-itu-t.c
crc-t10dif.c crypto: shash - remove shash_desc::flags 2019-04-25 15:38:12 +08:00
ctype.c
debug_info.c
debug_locks.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
debugobjects.c
dec_and_lock.c
decompress_bunzip2.c
decompress_inflate.c
decompress_unlz4.c
decompress_unlzma.c
decompress_unlzo.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 95 2019-05-24 17:37:53 +02:00
decompress_unxz.c
decompress.c
devres.c devres: always use dev_name() in devm_ioremap_resource() 2019-01-31 19:28:40 +01:00
digsig.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
dump_stack.c
dynamic_debug.c RDMA/core: Introduce RDMA subsystem ibdev_* print functions 2019-05-01 12:29:28 -04:00
dynamic_queue_limits.c
earlycpio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 283 2019-06-05 17:36:37 +02:00
error-inject.c treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively 2019-04-09 14:19:06 +02:00
errseq.c
extable.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
fault-inject.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
fdt_empty_tree.c
fdt_ro.c
fdt_rw.c
fdt_strerror.c
fdt_sw.c
fdt_wip.c
fdt.c
find_bit_benchmark.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295 2019-06-05 17:36:38 +02:00
find_bit.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
flex_proportions.c
gen_crc32table.c
gen_crc64table.c
genalloc.c lib/genalloc: introduce chunk owners 2019-06-13 17:34:56 -10:00
generic-radix-tree.c generic radix trees 2019-03-12 10:04:02 -07:00
glob.c
globtest.c
hexdump.c
hweight.c x86/kconfig: Disable CONFIG_GENERIC_HWEIGHT and remove __HAVE_ARCH_SW_HWEIGHT 2019-05-13 11:07:33 +02:00
idr.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
inflate.c
interval_tree_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
interval_tree.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
iomap_copy.c
iomap.c
iommu-helper.c
ioremap.c
iov_iter.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
irq_poll.c lib/irq_poll: Support schedules in non-interrupt contexts 2019-02-19 20:52:19 -07:00
irq_regs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
is_single_threaded.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
jedec_ddr_data.c
kasprintf.c
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.debug treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.kasan treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.kgdb treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.ubsan treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
kfifo.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
klist.c
kobject_uevent.c kobject: Don't trigger kobject_uevent(KOBJ_REMOVE) twice. 2019-04-01 07:37:12 +02:00
kobject.c kobject: clean up the kobject add documentation a bit more 2019-05-03 08:26:51 +02:00
kstrtox.c
kstrtox.h
libcrc32c.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
list_debug.c
list_sort.c lib/list_sort: fix kerneldoc build error 2019-05-23 09:27:39 -06:00
llist.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
locking-selftest-hardirq.h
locking-selftest-mutex.h
locking-selftest-rlock-hardirq.h
locking-selftest-rlock-softirq.h
locking-selftest-rlock.h
locking-selftest-rsem.h
locking-selftest-rtmutex.h
locking-selftest-softirq.h
locking-selftest-spin-hardirq.h
locking-selftest-spin-softirq.h
locking-selftest-spin.h
locking-selftest-wlock-hardirq.h
locking-selftest-wlock-softirq.h
locking-selftest-wlock.h
locking-selftest-wsem.h
locking-selftest.c locking/lockdep: Make it easy to detect whether or not inside a selftest 2019-02-28 07:55:43 +01:00
lockref.c lockref: Limit number of cmpxchg loop retries 2019-06-07 13:15:06 -07:00
logic_pio.c
lru_cache.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 91 2019-05-24 17:37:53 +02:00
lshrdi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
Makefile lib: Move mathematic helpers to separate folder 2019-05-14 19:52:49 -07:00
memcat_p.c
memory-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
memweight.c
muldi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
net_utils.c
netdev-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
nlattr.c netlink: add validation of NLA_F_NESTED flag 2019-05-04 01:27:11 -04:00
nmi_backtrace.c
nodemask.c
notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
notifier-error-inject.h
objagg.c lib: objagg: fix handling of object with 0 users when assembling hints 2019-02-14 12:41:54 -05:00
of-reconfig-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
oid_registry.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
once.c
packing.c lib: Add support for generic packing operations 2019-05-03 10:49:17 -04:00
parman.c
parser.c
pci_iomap.c
percpu_counter.c
percpu_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
percpu-refcount.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
plist.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 10 2019-05-21 11:28:45 +02:00
pm-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
radix-tree.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153 2019-05-30 11:26:32 -07:00
random32.c lib: Correct comment of prandom_seed 2019-05-17 11:32:47 -07:00
ratelimit.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
rbtree_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
rbtree.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
refcount.c refcount_t: Add ACQUIRE ordering on success for dec(sub)_and_test() variants 2019-02-04 09:03:31 +01:00
rhashtable.c rhashtable: Fix cmpxchg RCU warnings 2019-05-16 09:45:20 -07:00
sbitmap.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 328 2019-06-05 17:37:06 +02:00
scatterlist.c lib/scatterlist: Provide a DMA page iterator 2019-02-11 15:02:33 -07:00
seq_buf.c
sg_pool.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
sg_split.c
sha1.c
sha256.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
show_mem.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 435 2019-06-05 17:37:16 +02:00
siphash.c lib/siphash.c: mark expected switch fall-throughs 2019-04-25 19:47:24 +02:00
smp_processor_id.c kprobes: Prohibit probing on preemption checking debug functions 2019-02-13 08:16:40 +01:00
sort.c lib/sort.c: fix kernel-doc notation warnings 2019-06-01 15:51:31 -07:00
stackdepot.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
stmp_device.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
string_helpers.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
string.c lib/string: Add strscpy_pad() function 2019-04-08 16:44:21 -06:00
strncpy_from_user.c mm/uaccess: Use 'unsigned long' to placate UBSAN warnings on older GCC versions 2019-04-24 12:19:45 +02:00
strnlen_user.c mm/uaccess: Use 'unsigned long' to placate UBSAN warnings on older GCC versions 2019-04-24 12:19:45 +02:00
syscall.c syscalls: Remove start and number from syscall_get_arguments() args 2019-04-05 09:26:43 -04:00
test_bitfield.c
test_bitmap.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_bpf.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295 2019-06-05 17:36:38 +02:00
test_debug_virtual.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_firmware.c Char/Misc driver fixes for 5.2-rc4 2019-06-08 12:50:36 -07:00
test_hash.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_hexdump.c
test_ida.c
test_kasan.c kasan: remove use after scope bugs detection. 2019-03-05 21:07:13 -08:00
test_kmod.c lib/test_kmod.c: potential double free in error handling 2019-02-01 15:46:23 -08:00
test_list_sort.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_memcat_p.c
test_module.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_objagg.c test_objagg: Uninitialized variable in error handling 2019-02-13 22:13:29 -08:00
test_overflow.c
test_parman.c
test_printf.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_rhashtable.c rhashtable: move dereference inside rht_ptr() 2019-04-12 17:34:45 -07:00
test_siphash.c
test_sort.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_stackinit.c treewide: fix typos of SPDX-License-Identifier 2019-06-01 18:29:58 +02:00
test_static_key_base.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
test_static_keys.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
test_string.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_strscpy.c lib: Add test module for strscpy_pad 2019-04-08 16:44:21 -06:00
test_sysctl.c tools/testing/selftests/sysctl/sysctl.sh: add proc_do_large_bitmap() test case 2019-05-14 19:52:51 -07:00
test_ubsan.c lib/test_ubsan.c: VLA no longer used in kernel 2019-03-07 18:32:00 -08:00
test_user_copy.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
test_uuid.c
test_vmalloc.c lib/test_vmalloc.c:test_func(): eliminate local `ret' 2019-05-14 19:52:49 -07:00
test_xarray.c XArray: Fix xa_reserve for 2-byte aligned entries 2019-02-21 17:54:44 -05:00
test-kstrtox.c
test-string_helpers.c
textsearch.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
timerqueue.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ts_bm.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ts_fsm.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ts_kmp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ubsan.c Merge branch 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-06 11:39:17 -07:00
ubsan.h ubsan: Remove vla bound checks. 2019-05-06 11:12:09 -07:00
ucmpdi2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
ucs2_string.c
usercopy.c
uuid.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
vsprintf.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
win_minmax.c
xarray.c XArray: Fix xa_reserve for 2-byte aligned entries 2019-02-21 17:54:44 -05:00
xxhash.c