Nick Piggin 2bfdd01129 mm: direct IO starvation improvement ... commit 48b47c561e upstream. Direct IO can invalidate and sync a lot of pagecache pages in the mapping. A 4K direct IO will actually try to sync and/or invalidate the pagecache of the entire file, for example (which might be many GB or TB large). Improve this by doing range syncs. Also, memory no longer has to be unmapped to catch the dirty bits for syncing, as dirty bits would remain coherent due to dirty mmap accounting. This fixes the immediate DM deadlocks when doing direct IO reads to block device with a mounted filesystem, if only by papering over the problem somewhat rather than addressing the fsync starvation cases. Signed-off-by: Nick Piggin <npiggin@suse.de> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>		2009-01-24 16:36:28 -08:00
..
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: fix aligning of node-relative indexes and offsets	2008-08-20 15:40:31 -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	System call wrapper special cases	2009-01-18 10:35:34 -08:00
filemap_xip.c	mm: xip/ext2 fix block allocation race	2008-08-20 15:40:32 -07:00
filemap.c	mm: direct IO starvation improvement	2009-01-24 16:36:28 -08:00
fremap.c	System call wrappers part 13	2009-01-18 10:35:36 -08:00
highmem.c	highmem: Export totalhigh_pages.	2008-07-19 22:39:46 -07:00
hugetlb.c	hugetlb: make unmap_ref_private multi-size-aware	2008-11-20 14:54:46 -08:00
internal.h	hugetlbfs: handle pages higher order than MAX_ORDER	2008-11-13 09:55:56 -08:00
Kconfig	mm: Make generic weak get_user_pages_fast and EXPORT_GPL it	2008-08-12 17:52:53 +10:00
maccess.c	kgdb: fix optional arch functions and probe_kernel_*	2008-04-17 20:05:39 +02:00
madvise.c	System call wrappers part 14	2009-01-18 10:35:37 -08:00
Makefile	mmu-notifiers: core	2008-07-28 16:30:21 -07:00
memcontrol.c	mm owner: fix race between swapoff and exit	2008-09-29 08:41:47 -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	mm: rename page trylock	2008-08-04 21:31:34 -07:00
mempolicy.c	System call wrappers part 28	2009-01-18 10:35:39 -08:00
mempool.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
migrate.c	System call wrappers part 28	2009-01-18 10:35:39 -08:00
mincore.c	System call wrappers part 14	2009-01-18 10:35:37 -08:00
mlock.c	System call wrappers part 14	2009-01-18 10:35:37 -08:00
mm_init.c	mm: mminit_loglevel cannot be __meminitdata anymore	2008-08-20 15:40:30 -07:00
mmap.c	System call wrappers part 13	2009-01-18 10:35:36 -08:00
mmu_notifier.c	mmu-notifiers: core	2008-07-28 16:30:21 -07:00
mmzone.c	mm: mark the correct zone as full when scanning zonelists	2008-09-13 14:41:52 -07:00
mprotect.c	System call wrappers part 13	2009-01-18 10:35:36 -08:00
mremap.c	System call wrappers part 13	2009-01-18 10:35:36 -08:00
msync.c	System call wrappers part 13	2009-01-18 10:35:36 -08:00
nommu.c	System call wrappers part 13	2009-01-18 10:35:36 -08:00
oom_kill.c	security: Fix setting of PF_SUPERPRIV by __capable()	2008-08-14 22:59:43 +10:00
page_alloc.c	setup_per_zone_pages_min(): take zone->lock instead of zone->lru_lock	2008-12-18 09:13:41 -08:00
page_io.c	mm: fix PageUptodate data race	2008-02-05 09:44:19 -08:00
page_isolation.c	memory hotplug: fix page_zone() calculation in test_pages_isolated()	2008-11-20 14:54:47 -08:00
page-writeback.c	mm: write_cache_pages more terminate quickly	2009-01-24 16:36:27 -08:00
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	mm: size of quicklists shouldn't be proportional to the number of CPUs	2008-09-02 19:21:38 -07:00
readahead.c	mm: readahead scan lockless	2008-07-26 12:00:06 -07:00
rmap.c	anon_vma_prepare: properly lock even newly allocated entries	2008-10-25 14:32:41 -07:00
shmem_acl.c	[PATCH] sanitize ->permission() prototype	2008-07-26 20:53:14 -04:00
shmem.c	mm: rename page trylock	2008-08-04 21:31:34 -07:00
slab.c	mm: unexport ksize	2008-07-29 23:44:26 +03:00
slob.c	SLOB: fix bogus ksize calculation fix	2008-10-09 12:18:27 -07:00
slub.c	slub: fixed uninitialized counter in struct kmem_cache_node	2008-09-15 09:49:05 +03:00
sparse-vmemmap.c	Christoph has moved	2008-07-04 10:40:04 -07:00
sparse.c	mm/sparse.c: removed duplicated include	2008-08-12 16:07:30 -07:00
swap_state.c	mm: show free swap as signed	2008-08-20 15:40:30 -07:00
swap.c	mm: rename page trylock	2008-08-04 21:31:34 -07:00
swapfile.c	System call wrappers part 26	2009-01-18 10:35:39 -08:00
thrash.c	Bug in mm/thrash.c function grab_swap_token()	2007-05-11 08:29:32 -07:00
tiny-shmem.c	mm: tiny-shmem nommu fix	2008-10-02 15:53:13 -07:00
truncate.c	VFS: fix dio write returning EIO when try_to_release_page fails	2008-09-02 19:21:37 -07:00
util.c	mm: Make generic weak get_user_pages_fast and EXPORT_GPL it	2008-08-12 17:52:53 +10:00
vmalloc.c	Use WARN() in mm/vmalloc.c	2008-07-26 12:00:07 -07:00
vmscan.c	mm: rename page trylock	2008-08-04 21:31:34 -07:00
vmstat.c	[ARM] Skip memory holes in FLATMEM when reading /proc/pagetypeinfo	2008-08-27 20:09:28 +01:00