Nick Piggin 48b47c561e mm: direct IO starvation improvement ... 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>		2009-01-06 15:59:09 -08:00
..
allocpercpu.c	mm/allocpercpu.c: make 4 functions static	2008-07-26 12:00:12 -07:00
backing-dev.c	mm: change dirty limit type specifiers to unsigned long	2009-01-06 15:59:02 -08:00
bootmem.c	misc: replace __FUNCTION__ with __func__	2008-10-16 11:21:30 -07:00
bounce.c	bounce: don't rely on a zeroed bio_vec list	2008-12-29 08:29:52 +01:00
dmapool.c	dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too	2008-04-28 08:58:20 -07:00
fadvise.c	Remove Andrew Morton's old email accounts	2008-10-16 11:21:32 -07:00
failslab.c	SLUB: failslab support	2008-12-29 11:27:46 +02:00
filemap.c	mm: direct IO starvation improvement	2009-01-06 15:59:09 -08:00
filemap_xip.c	badpage: remove vma from page_remove_rmap	2009-01-06 15:59:07 -08:00
fremap.c	badpage: remove vma from page_remove_rmap	2009-01-06 15:59:07 -08:00
highmem.c	x86, pat: avoid highmem cache attribute aliasing	2008-08-15 17:22:57 +02:00
hugetlb.c	hugetlb: fix sparse warnings	2009-01-06 15:59:06 -08:00
internal.h	mm: make get_user_pages() interruptible	2009-01-06 15:59:08 -08:00
Kconfig	Unevictable LRU Infrastructure	2008-10-20 08:50:26 -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	shmem: unify regular and tiny shmem	2009-01-06 15:59:08 -08:00
memcontrol.c	mm: make mem_cgroup_resize_limit() static	2009-01-06 15:59:04 -08:00
memory.c	mm: make get_user_pages() interruptible	2009-01-06 15:59:08 -08:00
memory_hotplug.c	mm: remove GFP_HIGHUSER_PAGECACHE	2009-01-06 15:59:01 -08:00
mempolicy.c	Merge branch 'master' into next	2008-11-14 11:29:12 +11:00
mempool.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
migrate.c	mm: add Set,ClearPageSwapCache stubs	2009-01-06 15:59:02 -08:00
mincore.c	mm: remove nopage	2008-04-28 08:58:18 -07:00
mlock.c	mm: make get_user_pages() interruptible	2009-01-06 15:59:08 -08:00
mm_init.c	mm: mminit_loglevel cannot be __meminitdata anymore	2008-08-20 15:40:30 -07:00
mmap.c	mm/mmap.c: fix coding style	2009-01-06 15:59:08 -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	mm: cleanup: remove #ifdef CONFIG_MIGRATION	2009-01-06 15:59:00 -08:00
mremap.c	mm: update my address	2009-01-05 17:44:42 -08:00
msync.c	add a vfs_fsync helper	2009-01-05 11:54:28 -05:00
nommu.c	inode->i_op is never NULL	2009-01-05 11:54:28 -05:00
oom_kill.c	oom: print triggering task's cpuset and mems allowed	2009-01-06 15:58:59 -08:00
page-writeback.c	mm: add dirty_background_bytes and dirty_bytes sysctls	2009-01-06 15:59:03 -08:00
page_alloc.c	badpage: KERN_ALERT BUG instead of KERN_EMERG	2009-01-06 15:59:08 -08:00
page_cgroup.c	mm: make init_section_page_cgroup() static	2009-01-06 15:59:04 -08:00
page_io.c	mm: try_to_free_swap replaces remove_exclusive_swap_page	2009-01-06 15:59:03 -08:00
page_isolation.c	memory hotplug: fix page_zone() calculation in test_pages_isolated()	2008-11-06 15:41:19 -08:00
pagewalk.c	pagemap: pass mm into pagewalkers	2008-06-12 18:05:41 -07:00
pdflush.c	cpumask: convert mm/	2009-01-01 10:12:29 +10:30
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	vmscan: split LRU lists into anon & file sets	2008-10-20 08:50:25 -07:00
rmap.c	badpage: remove vma from page_remove_rmap	2009-01-06 15:59:07 -08:00
shmem.c	shmem: unify regular and tiny shmem	2009-01-06 15:59:08 -08:00
shmem_acl.c	[PATCH] sanitize ->permission() prototype	2008-07-26 20:53:14 -04:00
slab.c	cpumask: convert mm/	2009-01-01 10:12:29 +10:30
slob.c	slob: do not pass the SLAB flags as GFP in kmem_cache_create()	2008-12-15 16:27:06 -08:00
slub.c	cpumask: convert mm/	2009-01-01 10:12:29 +10:30
sparse-vmemmap.c	vmemmap: warn about page_structs with remote distance	2008-11-06 15:41:19 -08:00
sparse.c	meminit section warnings	2008-11-30 10:03:35 -08:00
swap.c	mm: try_to_free_swap replaces remove_exclusive_swap_page	2009-01-06 15:59:03 -08:00
swap_state.c	mm: remove gfp_mask from add_to_swap	2009-01-06 15:59:04 -08:00
swapfile.c	badpage: zap print_bad_pte on swap and file	2009-01-06 15:59:07 -08:00
thrash.c
truncate.c	mmap: handle mlocked pages during map, remap, unmap	2008-10-20 08:52:31 -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	mm: vmalloc make lazy unmapping configurable	2009-01-06 15:59:01 -08:00
vmscan.c	vmscan: shrink_active_list(): reduce lru_lock hold time	2009-01-06 15:59:08 -08:00
vmstat.c	cpumask: convert mm/	2009-01-01 10:12:29 +10:30