Matthew Wilcox 80cbd911ca Fix kmem_cache_free performance regression in slab ... The database performance group have found that half the cycles spent in kmem_cache_free are spent in this one call to BUG_ON. Moving it into the CONFIG_SLAB_DEBUG-only function cache_free_debugcheck() is a performance win of almost 0.5% on their particular benchmark. The call was added as part of commit ddc2e812d5 with the comment that "overhead should be minimal". It may have been minimal at the time, but it isn't now. [ Quoth Pekka Enberg: "I don't think the BUG_ON per se caused the performance regression but rather the virt_to_head_page() changes to virt_to_cache() that were added later." ] Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: Pekka J Enberg <penberg@cs.helsinki.fi> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2007-11-30 08:08:05 -08:00
..
allocpercpu.c	Slab allocators: Replace explicit zeroing with __GFP_ZERO	2007-07-17 10:23:02 -07:00
backing-dev.c	mm: per device dirty threshold	2007-10-17 08:42:45 -07:00
bootmem.c
bounce.c	block: Initial support for data-less (or empty) barrier support	2007-10-16 11:03:56 +02:00
fadvise.c
filemap_xip.c	mm: write iovec cleanup	2007-10-16 09:42:54 -07:00
filemap.c	Remove broken ptrace() special-case code from file mapping	2007-10-31 09:19:46 -07:00
fremap.c	remap_file_pages: kernel-doc corrections	2007-10-17 08:43:07 -07:00
highmem.c	Create the ZONE_MOVABLE zone	2007-07-17 10:22:59 -07:00
hugetlb.c	hugetlb: fix i_blocks accounting	2007-11-14 18:45:40 -08:00
internal.h	Breakout page_order() to internal.h to avoid special knowledge of the buddy allocator	2007-10-16 09:43:01 -07:00
Kconfig	small documentation fixes	2007-10-20 02:46:58 +02:00
madvise.c	speed up madvise_need_mmap_write() usage	2007-07-16 09:05:36 -07:00
Makefile	memory unplug: page isolation	2007-10-16 09:43:02 -07:00
memory_hotplug.c	Add IORESOUCE_BUSY flag for System RAM	2007-11-14 18:45:39 -08:00
memory.c	Swap delay accounting, include lock_page() delays	2007-11-14 18:45:44 -08:00
mempolicy.c	Migration: find correct vma in new_vma_page()	2007-11-14 18:45:38 -08:00
mempool.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
migrate.c	Typo fixes retrun -> return	2007-10-20 02:13:26 +02:00
mincore.c
mlock.c	do not limit locked memory when RLIMIT_MEMLOCK is RLIM_INFINITY	2007-07-16 09:05:37 -07:00
mmap.c	fix mprotect vma_wants_writenotify prot	2007-10-23 08:32:06 -07:00
mmzone.c
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: mm/nommu.c needs linux/module.h	2007-10-29 07:53:26 -07:00
oom_kill.c	oom_kill bug	2007-10-20 15:04:06 -07:00
page_alloc.c	Fix boot problem with iSeries lacking hugepage support	2007-11-29 09:24:51 -08:00
page_io.c	Drop 'size' argument from bio_endio and bi_end_io	2007-10-10 09:25:57 +02:00
page_isolation.c	memory hotremove: unset migrate type "ISOLATE" after removal	2007-11-14 18:45:38 -08:00
page-writeback.c	dirty page balancing: Get rid of broken unmapped_ratio logic	2007-11-15 16:41:52 -08:00
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 for page table pages	2007-05-07 12:12:54 -07:00
readahead.c	mm: bdi init hooks	2007-10-17 08:42:45 -07:00
rmap.c	[S390] Optimize storage key handling for anonymous pages	2007-11-20 11:13:46 +01:00
shmem_acl.c
shmem.c	tmpfs: restore missing clear_highpage	2007-11-28 11:04:28 -08:00
slab.c	Fix kmem_cache_free performance regression in slab	2007-11-30 08:08:05 -08:00
slob.c	slob: fix memory corruption	2007-11-15 08:36:27 -08:00
slub.c	SLUB: killed the unused "end" variable	2007-11-12 10:32:29 -08:00
sparse-vmemmap.c	memory hotplug fix: fix section mismatch in vmammap_allock_block()	2007-11-29 09:24:54 -08:00
sparse.c	Revert "x86_64: allocate sparsemem memmap above 4G"	2007-10-29 14:05:37 -07:00
swap_state.c	mm: clarify __add_to_swap_cache locking	2007-10-16 09:42:53 -07:00
swap.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
swapfile.c	Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION	2007-07-29 16:45:38 -07:00
thrash.c	Bug in mm/thrash.c function grab_swap_token()	2007-05-11 08:29:32 -07:00
tiny-shmem.c	r/o bind mounts: filesystem helpers for custom 'struct file's	2007-10-17 08:43:04 -07:00
truncate.c	Drop some headers from mm.h	2007-10-17 08:42:55 -07:00
util.c	fix mm/util.c:krealloc()	2007-11-14 18:45:41 -08:00
vmalloc.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
vmscan.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
vmstat.c	vmstat: fix section mismatch warning	2007-11-14 18:45:42 -08:00