Miklos Szeredi 84209e02de mm: dont clear PG_uptodate on truncate/invalidate ... Brian Wang reported that a FUSE filesystem exported through NFS could return I/O errors on read. This was traced to splice_direct_to_actor() returning a short or zero count when racing with page invalidation. However this is not FUSE or NFSD specific, other filesystems (notably NFS) also call invalidate_inode_pages2() to purge stale data from the cache. If this happens while such pages are sitting in a pipe buffer, then splice(2) from the pipe can return zero, and read(2) from the pipe can return ENODATA. The zero return is especially bad, since it implies end-of-file or disconnected pipe/socket, and is documented as such for splice. But returning an error for read() is also nasty, when in fact there was no error (data becoming stale is not an error). The same problems can be triggered by "hole punching" with madvise(MADV_REMOVE). Fix this by not clearing the PG_uptodate flag on truncation and invalidation. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Acked-by: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-08-02 09:12:34 -07:00
..
allocpercpu.c	mm/allocpercpu.c: make 4 functions static	2008-07-26 12:00:12 -07:00
backing-dev.c	mm: bdi: fix race in bdi_class device creation	2008-05-20 13:31:53 -07:00
bootmem.c	bootmem: replace node_boot_start in struct bootmem_data	2008-07-24 10:47:20 -07:00
bounce.c	block: Initial support for data-less (or empty) barrier support	2007-10-16 11:03:56 +02:00
dmapool.c	dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too	2008-04-28 08:58:20 -07:00
fadvise.c	xip: support non-struct page backed memory	2008-04-28 08:58:23 -07:00
filemap_xip.c	mmu-notifiers: core	2008-07-28 16:30:21 -07:00
filemap.c	Fix off-by-one error in iov_iter_advance()	2008-07-30 14:50:18 -07:00
fremap.c	mmu-notifiers: core	2008-07-28 16:30:21 -07:00
highmem.c	highmem: Export totalhigh_pages.	2008-07-19 22:39:46 -07:00
hugetlb.c	mm/hugetlb: don't crash when HPAGE_SHIFT is 0	2008-08-01 12:46:41 -07:00
internal.h	mm: export prep_compound_page to mm	2008-07-24 10:47:17 -07:00
Kconfig	mmu-notifiers: core	2008-07-28 16:30:21 -07:00
maccess.c	kgdb: fix optional arch functions and probe_kernel_*	2008-04-17 20:05:39 +02:00
madvise.c	madvise: update function comment of madvise_dontneed	2008-07-30 09:41:45 -07:00
Makefile	mmu-notifiers: core	2008-07-28 16:30:21 -07:00
memcontrol.c	memcg: remove redundant check in move_task()	2008-07-30 09:41:44 -07:00
memory_hotplug.c	memory-hotplug: add sysfs removable attribute for hotplug memory remove	2008-07-24 10:47:21 -07:00
memory.c	Remove EXPORTS of follow_page & zap_page_range	2008-08-01 13:19:16 -07:00
mempolicy.c	hugetlb: modular state for hugetlb page size	2008-07-24 10:47:17 -07:00
mempool.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
migrate.c	mm: spinlock tree_lock	2008-07-26 12:00:06 -07:00
mincore.c	mm: remove nopage	2008-04-28 08:58:18 -07:00
mlock.c	do not limit locked memory when RLIMIT_MEMLOCK is RLIM_INFINITY	2007-07-16 09:05:37 -07:00
mm_init.c	mm: create /sys/kernel/mm	2008-07-24 10:47:17 -07:00
mmap.c	mmu-notifiers: core	2008-07-28 16:30:21 -07:00
mmu_notifier.c	mmu-notifiers: core	2008-07-28 16:30:21 -07:00
mmzone.c	mm: filter based on a nodemask as well as a gfp_mask	2008-04-28 08:58:19 -07:00
mprotect.c	mmu-notifiers: core	2008-07-28 16:30:21 -07:00
mremap.c	mmu-notifiers: core	2008-07-28 16:30:21 -07:00
msync.c	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
nommu.c	tracehook: tracehook_expect_breakpoints	2008-07-26 12:00:09 -07:00
oom_kill.c	oom_kill: remove unused parameter in badness()	2008-04-28 08:58:26 -07:00
page_alloc.c	mm: remove find_max_pfn_with_active_regions	2008-07-30 09:41:44 -07:00
page_io.c	mm: fix PageUptodate data race	2008-02-05 09:44:19 -08:00
page_isolation.c	memory hotremove: unset migrate type "ISOLATE" after removal	2007-11-14 18:45:38 -08:00
page-writeback.c	mm: spinlock tree_lock	2008-07-26 12:00:06 -07:00
pagewalk.c	pagemap: pass mm into pagewalkers	2008-06-12 18:05:41 -07:00
pdflush.c	pdflush: use time_after() instead of open-coding it	2008-07-25 10:53:28 -07:00
prio_tree.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
quicklist.c	quicklists: Only consider memory that can be used with GFP_KERNEL	2008-01-14 08:52:22 -08:00
readahead.c	mm: readahead scan lockless	2008-07-26 12:00:06 -07:00
rmap.c	[S390] Optimize storage key operations for anon pages	2008-08-01 16:39:30 +02:00
shmem_acl.c	[PATCH] sanitize ->permission() prototype	2008-07-26 20:53:14 -04:00
shmem.c	tmpfs: fix kernel BUG in shmem_delete_inode	2008-07-28 16:30:20 -07:00
slab.c	SL*B: drop kmem cache argument from constructor	2008-07-26 12:00:07 -07:00
slob.c	SL*B: drop kmem cache argument from constructor	2008-07-26 12:00:07 -07:00
slub.c	SL*B: drop kmem cache argument from constructor	2008-07-26 12:00:07 -07:00
sparse-vmemmap.c	Christoph has moved	2008-07-04 10:40:04 -07:00
sparse.c	make mm/sparse.c: make a function static	2008-07-26 12:00:12 -07:00
swap_state.c	mm: print swapcache page count in show_swap_cache_info()	2008-07-26 12:00:10 -07:00
swap.c	swap: update function comment of release_pages	2008-07-30 09:41:46 -07:00
swapfile.c	swapfile/vmscan: update comments related to vmscan functions	2008-07-30 09:41:46 -07:00
thrash.c	Bug in mm/thrash.c function grab_swap_token()	2007-05-11 08:29:32 -07:00
tiny-shmem.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2008-03-25 08:57:47 -07:00
truncate.c	mm: dont clear PG_uptodate on truncate/invalidate	2008-08-02 09:12:34 -07:00
util.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6	2008-07-26 20:17:56 -07:00
vmalloc.c	Use WARN() in mm/vmalloc.c	2008-07-26 12:00:07 -07:00
vmscan.c	do_try_to_free_page: update comments related to vmscan functions	2008-07-30 09:41:46 -07:00
vmstat.c	mm/vmstat.c: proper externs	2008-07-24 10:47:14 -07:00