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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>		17 years ago
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Kconfig	…
Makefile	…
allocpercpu.c	…
backing-dev.c	…
bootmem.c	…
bounce.c	…
fadvise.c	…
filemap.c	…
filemap_xip.c	…
fremap.c	…
highmem.c	…
hugetlb.c	hugetlb: fix i_blocks accounting	17 years ago
internal.h	…
madvise.c	…
memory.c	Swap delay accounting, include lock_page() delays	17 years ago
memory_hotplug.c	Add IORESOUCE_BUSY flag for System RAM	17 years ago
mempolicy.c	…
mempool.c	…
migrate.c	…
mincore.c	…
mlock.c	…
mmap.c	…
mmzone.c	…
mprotect.c	…
mremap.c	…
msync.c	…
nommu.c	…
oom_kill.c	…
page-writeback.c	dirty page balancing: Get rid of broken unmapped_ratio logic	17 years ago
page_alloc.c	Fix boot problem with iSeries lacking hugepage support	17 years ago
page_io.c	…
page_isolation.c	memory hotremove: unset migrate type "ISOLATE" after removal	17 years ago
pdflush.c	…
prio_tree.c	…
quicklist.c	…
readahead.c	…
rmap.c	[S390] Optimize storage key handling for anonymous pages	17 years ago
shmem.c	tmpfs: restore missing clear_highpage	17 years ago
shmem_acl.c	…
slab.c	Fix kmem_cache_free performance regression in slab	17 years ago
slob.c	slob: fix memory corruption	17 years ago
slub.c	…
sparse-vmemmap.c	memory hotplug fix: fix section mismatch in vmammap_allock_block()	17 years ago
sparse.c	…
swap.c	…
swap_state.c	…
swapfile.c	…
thrash.c	…
tiny-shmem.c	…
truncate.c	…
util.c	fix mm/util.c:krealloc()	17 years ago
vmalloc.c	…
vmscan.c	…
vmstat.c	vmstat: fix section mismatch warning	17 years ago