Andrew Morton 4dd4b92021 revert "kswapd should only wait on IO if there is IO" ... Revert commit f1a9ee758d: Author: Rik van Riel <riel@redhat.com> Date: Thu Feb 7 00:14:08 2008 -0800 kswapd should only wait on IO if there is IO The current kswapd (and try_to_free_pages) code has an oddity where the code will wait on IO, even if there is no IO in flight. This problem is notable especially when the system scans through many unfreeable pages, causing unnecessary stalls in the VM. Additionally, tasks without __GFP_FS or __GFP_IO in the direct reclaim path will sleep if a significant number of pages are encountered that should be written out. This gives kswapd a chance to write out those pages, while the direct reclaim task sleeps. Signed-off-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Because of large latencies and interactivity problems reported by Carlos, here: http://lkml.org/lkml/2008/3/22/211 Cc: Rik van Riel <riel@redhat.com> Cc: "Carlos R. Mafra" <crmafra2@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-03-24 19:22:19 -07:00
..
allocpercpu.c	alloc_percpu() fails to allocate percpu data	2008-03-04 16:35:11 -08:00
backing-dev.c	mm/backing-dev.c: fix percpu_counter_destroy call bug in bdi_init	2007-12-05 09:21:18 -08:00
bootmem.c	mm: fix boundary checking in free_bootmem_core	2008-03-24 19:22:19 -07:00
bounce.c	block: Initial support for data-less (or empty) barrier support	2007-10-16 11:03:56 +02:00
dmapool.c	pool: Improve memory usage for devices which can't cross boundaries	2007-12-04 10:39:58 -05:00
fadvise.c	check ADVICE of fadvise64_64 even if get_xip_page is given	2008-02-05 09:44:19 -08:00
filemap_xip.c	Use pgoff_t instead of unsigned long	2008-02-08 09:22:32 -08:00
filemap.c	mm: fix various kernel-doc comments	2008-03-19 18:53:35 -07:00
fremap.c	mm: fix various kernel-doc comments	2008-03-19 18:53:35 -07:00
highmem.c	mm: highmem kernel-doc additions	2008-03-19 18:53:35 -07:00
hugetlb.c	hugetlb: correct page count for surplus huge pages	2008-03-10 18:01:19 -07:00
internal.h	Solve section mismatch for free_area_init_core.	2008-02-23 17:13:24 -08:00
Kconfig	sh: Bump number of quicklists for SH-5.	2008-01-28 13:18:55 +09:00
madvise.c	speed up madvise_need_mmap_write() usage	2007-07-16 09:05:36 -07:00
Makefile	Memory controller: rename to Memory Resource Controller	2008-03-04 16:35:12 -08:00
memcontrol.c	memcgroup: fix check for thread being a group leader in memcgroup	2008-03-19 18:53:35 -07:00
memory_hotplug.c	Page allocator: clean up pcp draining functions	2008-02-05 09:44:17 -08:00
memory.c	memcg: when do_swap's do_wp_page fails	2008-03-04 16:35:14 -08:00
mempolicy.c	mempolicy: fix reference counting bugs	2008-03-10 18:01:19 -07:00
mempool.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
migrate.c	memcg: fix VM_BUG_ON from page migration	2008-03-04 16:35:14 -08:00
mincore.c	[PATCH] mincore: vma crossing fix	2007-02-15 09:57:03 -08:00
mlock.c	do not limit locked memory when RLIMIT_MEMLOCK is RLIM_INFINITY	2007-07-16 09:05:37 -07:00
mmap.c	mm: special mapping nopage	2008-02-08 18:57:39 -08:00
mmzone.c	[PATCH] remove EXPORT_UNUSED_SYMBOL'ed symbols	2006-12-07 08:39:44 -08:00
mprotect.c	fix mprotect vma_wants_writenotify prot	2007-10-23 08:32:06 -07:00
mremap.c	sparse pointer use of zero as null	2007-10-18 14:37:31 -07:00
msync.c	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
nommu.c	nommu: add new vmalloc_user() and remap_vmalloc_range() interfaces.	2008-02-05 09:44:21 -08:00
oom_kill.c	mm/oom_kill: fix kernel-doc	2008-03-19 18:53:35 -07:00
page_alloc.c	memcg: bad page if page_cgroup when free	2008-03-04 16:35:15 -08:00
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	writeback: speed up writeback of big dirty files	2008-02-05 09:44:19 -08:00
pagewalk.c	mm: fix various kernel-doc comments	2008-03-19 18:53:35 -07:00
pdflush.c	Freezer: make kernel threads nonfreezable by default	2007-07-17 10:23:02 -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: fix kernel-doc notation	2008-03-19 18:53:37 -07:00
rmap.c	mm: rmap kernel-doc fixes	2008-03-19 18:53:35 -07:00
shmem_acl.c	[PATCH] Fix typos in mm/shmem_acl.c	2006-10-11 11:14:23 -07:00
shmem.c	mm/shmem and tiny-shmem: fix some kernel-doc	2008-03-19 18:53:35 -07:00
slab.c	mm: fix various kernel-doc comments	2008-03-19 18:53:35 -07:00
slob.c	slob: reduce external fragmentation by using three free lists	2008-02-05 09:44:19 -08:00
slub.c	slub page alloc fallback: Enable interrupts for GFP_WAIT.	2008-03-17 11:14:17 -07:00
sparse-vmemmap.c	memory hotplug fix: fix section mismatch in vmammap_allock_block()	2007-11-29 09:24:54 -08:00
sparse.c	mm: fix section mismatch warning in sparse.c	2008-02-05 09:44:19 -08:00
swap_state.c	mm: fix various kernel-doc comments	2008-03-19 18:53:35 -07:00
swap.c	mm: fix various kernel-doc comments	2008-03-19 18:53:35 -07:00
swapfile.c	d_path: Make seq_path() use a struct path argument	2008-02-14 21:17:08 -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/shmem and tiny-shmem: fix some kernel-doc	2008-03-19 18:53:35 -07:00
truncate.c	docbook: fix kernel-api source files	2008-03-03 10:47:14 -08:00
util.c	fix mm/util.c:krealloc()	2007-11-14 18:45:41 -08:00
vmalloc.c	mm: fix various kernel-doc comments	2008-03-19 18:53:35 -07:00
vmscan.c	revert "kswapd should only wait on IO if there is IO"	2008-03-24 19:22:19 -07:00
vmstat.c	vmstat: remove prefetch	2008-02-05 09:44:18 -08:00