Ingo Molnar f180053694 x86, mm: dont use non-temporal stores in pagecache accesses ... Impact: standardize IO on cached ops On modern CPUs it is almost always a bad idea to use non-temporal stores, as the regression in this commit has shown it: 30d697f: x86: fix performance regression in write() syscall The kernel simply has no good information about whether using non-temporal stores is a good idea or not - and trying to add heuristics only increases complexity and inserts fragility. The regression on cached write()s took very long to be found - over two years. So dont take any chances and let the hardware decide how it makes use of its caches. The only exception is drivers/gpu/drm/i915/i915_gem.c: there were we are absolutely sure that another entity (the GPU) will pick up the dirty data immediately and that the CPU will not touch that data before the GPU will. Also, keep the _nocache() primitives to make it easier for people to experiment with these details. There may be more clear-cut cases where non-cached copies can be used, outside of filemap.c. Cc: Salman Qazi <sqazi@google.com> Cc: Nick Piggin <npiggin@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2009-03-02 11:06:49 +01:00
..
allocpercpu.c	mm/allocpercpu.c: make 4 functions static	2008-07-26 12:00:12 -07:00
backing-dev.c	Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-01-06 17:10:04 -08:00
bootmem.c	bootmem: print request details before BUG_ON(them)	2009-01-06 15:59:10 -08:00
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	[CVE-2009-0029] System call wrapper special cases	2009-01-14 14:15:18 +01:00
failslab.c	SLUB: failslab support	2008-12-29 11:27:46 +02:00
filemap_xip.c	x86, mm: dont use non-temporal stores in pagecache accesses	2009-03-02 11:06:49 +01:00
filemap.c	x86, mm: dont use non-temporal stores in pagecache accesses	2009-03-02 11:06:49 +01:00
fremap.c	Do not account for the address space used by hugetlbfs using VM_ACCOUNT	2009-02-10 10:48:42 -08:00
highmem.c	x86, pat: avoid highmem cache attribute aliasing	2008-08-15 17:22:57 +02:00
hugetlb.c	Do not account for hugetlbfs quota at mmap() time if mapping [SHM|MAP]_NORESERVE	2009-02-11 12:38:09 -08:00
internal.h	mm: make get_user_pages() interruptible	2009-01-06 15:59:08 -08:00
Kconfig	Remove obsolete CONFIG_RESOURCES_64BIT	2009-01-06 15:59:14 -08:00
maccess.c	kgdb: fix optional arch functions and probe_kernel_*	2008-04-17 20:05:39 +02:00
madvise.c	[CVE-2009-0029] System call wrappers part 14	2009-01-14 14:15:24 +01:00
Makefile	shmem: unify regular and tiny shmem	2009-01-06 15:59:08 -08:00
memcontrol.c	memcg: NULL pointer dereference at rmdir on some NUMA systems	2009-01-29 18:04:44 -08:00
memory_hotplug.c	mm: remove GFP_HIGHUSER_PAGECACHE	2009-01-06 15:59:01 -08:00
memory.c	do_wp_page: fix regression with execute in place	2009-02-05 12:56:48 -08:00
mempolicy.c	[CVE-2009-0029] System call wrappers part 28	2009-01-14 14:15:30 +01:00
mempool.c
migrate.c	migration: migrate_vmas should check "vma"	2009-02-11 14:25:34 -08:00
mincore.c	[CVE-2009-0029] System call wrappers part 14	2009-01-14 14:15:24 +01:00
mlock.c	Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-02-17 14:27:39 -08:00
mm_init.c	mm: mminit_loglevel cannot be __meminitdata anymore	2008-08-20 15:40:30 -07:00
mmap.c	mm: rearrange exit_mmap() to unlock before arch_exit_mmap	2009-02-11 14:25:37 -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	Do not account for the address space used by hugetlbfs using VM_ACCOUNT	2009-02-10 10:48:42 -08:00
mremap.c	[CVE-2009-0029] System call wrappers part 13	2009-01-14 14:15:23 +01:00
msync.c	[CVE-2009-0029] System call wrappers part 13	2009-01-14 14:15:23 +01:00
nommu.c	uclinux: add process name to allocation error message	2009-01-27 16:42:03 +10:00
oom_kill.c	memcg: avoid deadlock caused by race between oom and cpuset_attach	2009-01-08 08:31:09 -08:00
page_alloc.c	mm: fix memmap init for handling memory hole	2009-02-18 15:37:55 -08:00
page_cgroup.c	memcg: use __GFP_NOWARN in page cgroup allocation	2009-02-11 14:25:35 -08:00
page_io.c	block: fix bad definition of BIO_RW_SYNC	2009-02-18 10:32:00 +01:00
page_isolation.c	memory hotplug: fix page_zone() calculation in test_pages_isolated()	2008-11-06 15:41:19 -08:00
page-writeback.c	mm: task dirty accounting fix	2009-02-18 15:37:54 -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
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	mm: fix mlocked page counter mismatch	2009-02-11 14:25:35 -08:00
shmem_acl.c	[PATCH] sanitize ->permission() prototype	2008-07-26 20:53:14 -04:00
shmem.c	Stop playing silly games with the VM_ACCOUNT flag	2009-01-31 15:08:56 -08:00
slab.c	mm: Export symbol ksize()	2009-02-12 17:50:46 +02:00
slob.c	mm: Export symbol ksize()	2009-02-12 17:50:46 +02:00
slub.c	mm: Export symbol ksize()	2009-02-12 17:50:46 +02:00
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_state.c	memcg: mem+swap controller core	2009-01-08 08:31:05 -08:00
swap.c	memcg: add zone_reclaim_stat	2009-01-08 08:31:08 -08:00
swapfile.c	memcg: fix refcnt handling at swapoff	2009-01-29 18:04:43 -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	x86: make vmap yell louder when it is used under irqs_disabled()	2009-02-25 16:38:34 +01:00
vmscan.c	memcg: fix calculation of active_ratio	2009-01-08 08:31:09 -08:00
vmstat.c	cpumask: convert mm/	2009-01-01 10:12:29 +10:30