Dave Chinner d87815cb20 writeback: limit write_cache_pages integrity scanning to current EOF ... sync can currently take a really long time if a concurrent writer is extending a file. The problem is that the dirty pages on the address space grow in the same direction as write_cache_pages scans, so if the writer keeps ahead of writeback, the writeback will not terminate until the writer stops adding dirty pages. For a data integrity sync, we only need to write the pages dirty at the time we start the writeback, so we can stop scanning once we get to the page that was at the end of the file at the time the scan started. This will prevent operations like copying a large file preventing sync from completing as it will not write back pages that were dirtied after the sync was started. This does not impact the existing integrity guarantees, as any dirty page (old or new) within the EOF range at the start of the scan will still be captured. This patch will not prevent sync from blocking on large writes into holes. That requires more complex intervention while this patch only addresses the common append-case of this sync holdoff. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2010-06-08 18:12:44 -07:00
..
backing-dev.c	writeback: fixups for !dirty_writeback_centisecs	2010-05-21 20:00:35 +02:00
bootmem.c	Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip	2010-04-07 11:02:23 -07:00
bounce.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
compaction.c	mm: compaction: add a tunable that decides when memory should be compacted and when it should be reclaimed	2010-05-25 08:06:59 -07:00
debug-pagealloc.c
dmapool.c
fadvise.c	readahead: introduce FMODE_RANDOM for POSIX_FADV_RANDOM	2010-03-06 11:26:25 -08:00
failslab.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
filemap_xip.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
filemap.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse	2010-05-30 09:16:14 -07:00
fremap.c
highmem.c	highmem: remove unneeded #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT for debug_kmap_atomic()	2010-05-25 08:07:01 -07:00
hugetlb.c	cpuset,mm: fix no node to alloc memory when changing cpuset's mems	2010-05-25 08:06:57 -07:00
hwpoison-inject.c
init-mm.c
internal.h
Kconfig	mm: allow CONFIG_MIGRATION to be set without CONFIG_NUMA or memory hot-remove	2010-05-25 08:06:59 -07:00
Kconfig.debug
kmemcheck.c	kmemcheck: Fix build errors due to missing slab.h	2010-03-30 22:02:32 +09:00
kmemleak-test.c
kmemleak.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
ksm.c	mm: migration: share the anon_vma ref counts between KSM and page migration	2010-05-25 08:06:58 -07:00
maccess.c
madvise.c
Makefile	mm: compaction: memory compaction core	2010-05-25 08:06:59 -07:00
memcontrol.c	memcg: clean up memory thresholds	2010-05-27 09:12:44 -07:00
memory_hotplug.c	mem-hotplug: fix potential race while building zonelist for new populated zone	2010-05-25 08:07:02 -07:00
memory-failure.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
memory.c	mm: document follow_page()	2010-05-25 08:07:00 -07:00
mempolicy.c	mempolicy: ERR_PTR dereference in mpol_shared_policy_init()	2010-05-26 08:19:23 -07:00
mempool.c
migrate.c	memcg: fix mis-accounting of file mapped racy with migration	2010-05-27 09:12:44 -07:00
mincore.c	mincore: do nested page table walks	2010-05-25 08:06:58 -07:00
mlock.c	x86, perf, bts, mm: Delete the never used BTS-ptrace code	2010-03-26 11:33:55 +01:00
mm_init.c
mmap.c	mmap: check ->vm_ops before dereferencing	2010-04-27 08:26:51 -07:00
mmu_context.c	exit: fix oops in sync_mm_rss	2010-03-24 16:31:21 -07:00
mmu_notifier.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
mmzone.c
mprotect.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
mremap.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
msync.c	sanitize vfs_fsync calling conventions	2010-05-21 18:31:21 -04:00
nommu.c	nommu: allow private mappings of read-only devices	2010-05-26 08:19:23 -07:00
oom_kill.c	memcg: make oom killer a no-op when no killable task can be found	2010-05-27 09:12:43 -07:00
page_alloc.c	numa: introduce numa_mem_id()- effective local memory node id	2010-05-27 09:12:57 -07:00
page_cgroup.c	memcg: avoid use cmpxchg in swap cgroup maintainance	2010-03-17 18:43:47 -07:00
page_io.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
page_isolation.c
page-writeback.c	writeback: limit write_cache_pages integrity scanning to current EOF	2010-06-08 18:12:44 -07:00
pagewalk.c	pagemap: fix pfn calculation for hugepage	2010-04-07 08:38:04 -07:00
percpu_up.c	percpu: don't implicitly include slab.h from percpu.h	2010-03-30 22:02:32 +09:00
percpu-km.c	percpu: implement kernel memory based chunk allocation	2010-05-01 08:30:50 +02:00
percpu-vm.c	percpu: move vmalloc based chunk management into percpu-vm.c	2010-05-01 08:30:50 +02:00
percpu.c	percpu: implement kernel memory based chunk allocation	2010-05-01 08:30:50 +02:00
prio_tree.c
quicklist.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
readahead.c	readahead.c: fix comment	2010-05-25 08:07:00 -07:00
rmap.c	mm: migration: avoid race between shift_arg_pages() and rmap_walk() during migration by not migrating temporary stacks	2010-05-25 08:06:59 -07:00
shmem.c	fix truncate inode time modification breakage	2010-06-04 17:16:30 -04:00
slab.c	numa: slab: use numa_mem_id() for slab local memory node	2010-05-27 09:12:57 -07:00
slob.c	mm: Move ARCH_SLAB_MINALIGN and ARCH_KMALLOC_MINALIGN to <linux/slob_def.h>	2010-05-19 22:03:13 +03:00
slub.c	Merge branch 'slub/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6	2010-05-30 12:46:17 -07:00
sparse-vmemmap.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
sparse.c	sparsemem: on no vmemmap path put mem_map on node high too	2010-05-25 08:06:56 -07:00
swap_state.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
swap.c	mm: export lru_cache_add_*() to modules	2010-05-25 15:06:06 +02:00
swapfile.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6	2010-05-21 15:26:46 -07:00
thrash.c
truncate.c	fs: introduce new truncate sequence	2010-05-27 22:15:33 -04:00
util.c	slab: Generify kernel pointer validation	2010-04-09 10:09:50 -07:00
vmalloc.c
vmscan.c	vmscan: fix do_try_to_free_pages() return value when priority==0 reclaim failure	2010-06-04 15:21:45 -07:00
vmstat.c	mm: compaction: direct compact when a high-order allocation fails	2010-05-25 08:06:59 -07:00