linux/mm
Benjamin LaHaise 9884fd8df1 [PATCH] Use 32 bit division in slab_put_obj()
Improve the performance of slab_put_obj().  Without the cast, gcc considers
ptrdiff_t a 64 bit signed integer and ends up emitting code to use a full
signed 128 bit divide on EM64T, which is substantially slower than a 32 bit
unsigned divide.

I noticed this when looking at the profile of a case where the slab balance
is just on edge and thrashes back and forth freeing a block.

Signed-off-by: Benjamin LaHaise <benjamin.c.lahaise@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-01 08:53:15 -08:00
..
bootmem.c
fadvise.c
filemap_xip.c
filemap.c [PATCH] mm: migration page refcounting fix 2006-01-18 19:20:17 -08:00
filemap.h
fremap.c
highmem.c
hugetlb.c
internal.h
Kconfig
madvise.c
Makefile
memory_hotplug.c
memory.c
mempolicy.c [PATCH] mm: optimize numa policy handling in slab allocator 2006-01-18 19:20:18 -08:00
mempool.c
mincore.c
mlock.c [PATCH] move capable() to capability.h 2006-01-11 18:42:13 -08:00
mmap.c [PATCH] move capable() to capability.h 2006-01-11 18:42:13 -08:00
mprotect.c
mremap.c [PATCH] move capable() to capability.h 2006-01-11 18:42:13 -08:00
msync.c
nommu.c
oom_kill.c [PATCH] cpuset oom lock fix 2006-01-14 18:27:10 -08:00
page_alloc.c [PATCH] __cpuinit functions wrongly marked __meminit 2006-02-01 08:53:09 -08:00
page_io.c
page-writeback.c [PATCH] mm: dirty_exceeded speedup 2006-01-18 19:20:17 -08:00
pdflush.c
prio_tree.c
readahead.c
rmap.c [PATCH] mm: migration page refcounting fix 2006-01-18 19:20:17 -08:00
shmem.c [PATCH] Add tmpfs options for memory placement policies 2006-01-14 18:27:07 -08:00
slab.c [PATCH] Use 32 bit division in slab_put_obj() 2006-02-01 08:53:15 -08:00
slob.c
sparse.c
swap_state.c
swap.c [PATCH] mm: migration page refcounting fix 2006-01-18 19:20:17 -08:00
swapfile.c [PATCH] sem2mutex: mm/slab.c 2006-01-18 19:20:18 -08:00
thrash.c
tiny-shmem.c [PATCH] do_truncate() call fix in tiny-shmem.c 2006-01-12 09:08:49 -08:00
truncate.c
util.c
vmalloc.c
vmscan.c [PATCH] zone_reclaim: minor fixes 2006-02-01 08:53:15 -08:00