Linus Torvalds 00e962c540 Revert "SLUB: Alternate fast paths using cmpxchg_local" ... This reverts commit 1f84260c8c, which is suspected to be the reason for some very occasional and hard-to-trigger crashes that usually look related to memory allocation (mostly reported in networking, but since that's generally the most common source of shortlived allocations - and allocations in interrupt contexts - that in itself is not a big clue). See for example http://bugzilla.kernel.org/show_bug.cgi?id=9973 http://lkml.org/lkml/2008/2/19/278 etc. One promising suspicion for what the root cause of bug is (which also explains why it's so hard to trigger in practice) came from Eric Dumazet: "I wonder how SLUB_FASTPATH is supposed to work, since it is affected by a classical ABA problem of lockless algo. cmpxchg_local(&c->freelist, object, object[c->offset]) can succeed, while an interrupt came (on this cpu), and several allocations were done, and one free was performed at the end of this interruption, so 'object' was recycled. c->freelist can then contain the previous value (object), but object[c->offset] was changed by IRQ. We then put back in freelist an already allocated object." but another reason for the revert is simply that everybody agrees that this code was the main suspect just by virtue of the pattern of oopses. Cc: Torsten Kaiser <just.for.lkml@googlemail.com> Cc: Christoph Lameter <clameter@sgi.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Ingo Molnar <mingo@elte.hu> Cc: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-02-19 09:08:49 -08:00
..
allocpercpu.c
backing-dev.c
bootmem.c
bounce.c
dmapool.c
fadvise.c
filemap_xip.c	Use pgoff_t instead of unsigned long	2008-02-08 09:22:32 -08:00
filemap.c	remove final fastcall users	2008-02-13 16:21:18 -08:00
fremap.c
highmem.c
hugetlb.c	hugetlb: fix overcommit locking	2008-02-13 16:21:18 -08:00
internal.h
Kconfig
madvise.c
Makefile
memcontrol.c	memcontrol: add vm_match_cgroup()	2008-02-09 11:08:33 -08:00
memory_hotplug.c
memory.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86	2008-02-14 21:23:19 -08:00
mempolicy.c	d_path: Make seq_path() use a struct path argument	2008-02-14 21:17:08 -08:00
mempool.c
migrate.c
mincore.c
mlock.c
mmap.c	mm: special mapping nopage	2008-02-08 18:57:39 -08:00
mmzone.c
mprotect.c
mremap.c
msync.c
nommu.c
oom_kill.c
page_alloc.c	misc: removal of final callers using fastcall	2008-02-08 09:22:31 -08:00
page_io.c
page_isolation.c
page-writeback.c
pagewalk.c
pdflush.c
prio_tree.c
quicklist.c
readahead.c
rmap.c	memcontrol: add vm_match_cgroup()	2008-02-09 11:08:33 -08:00
shmem_acl.c
shmem.c	mount-options-fix-tmpfs-fix	2008-02-08 09:22:41 -08:00
slab.c	slab: avoid double initialization & do initialization in 1 place	2008-02-14 15:30:01 -08:00
slob.c
slub.c	Revert "SLUB: Alternate fast paths using cmpxchg_local"	2008-02-19 09:08:49 -08:00
sparse-vmemmap.c
sparse.c
swap_state.c
swap.c
swapfile.c	d_path: Make seq_path() use a struct path argument	2008-02-14 21:17:08 -08:00
thrash.c
tiny-shmem.c
truncate.c
util.c
vmalloc.c	CONFIG_HIGHPTE vs. sub-page page tables.	2008-02-08 09:22:42 -08:00
vmscan.c
vmstat.c