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

[PATCH] FRV: Clean up bootmem allocator's page freeing algorithm

2006-01-06 08:33:26 -08:00

fadvise.c

[PATCH] fadvise: return ESPIPE on FIFO/pipe

2006-01-08 20:14:00 -08:00

filemap_xip.c

[PATCH] replace inode_update_time with file_update_time

2006-01-10 08:01:30 -08:00

filemap.c

[PATCH] mm: migration page refcounting fix

2006-01-18 19:20:17 -08:00

filemap.h

[PATCH] xip: reduce code duplication

2005-06-24 00:06:41 -07:00

fremap.c

VM: add common helper function to create the page tables

2005-11-29 14:03:14 -08:00

highmem.c

[PATCH] gfp_t: the rest

2005-10-28 08:16:51 -07:00

hugetlb.c

[PATCH] mm: make hugepages obey cpusets.

2006-01-08 20:12:43 -08:00

internal.h

[PATCH] FRV: Clean up bootmem allocator's page freeing algorithm

2006-01-06 08:33:26 -08:00

Kconfig

[PATCH] Swap Migration V5: Add CONFIG_MIGRATION for page migration support

2006-01-08 20:12:41 -08:00

madvise.c

[PATCH] madvise(MADV_REMOVE): remove pages from tmpfs shm backing store

2006-01-06 08:33:22 -08:00

Makefile

[PATCH] slob: introduce the SLOB allocator

2006-01-08 20:13:41 -08:00

memory_hotplug.c

[PATCH] memhotplug: __add_section remove unused pgdat definition

2006-01-06 08:33:21 -08:00

memory.c

[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem

2006-01-09 15:59:24 -08:00

mempolicy.c

[PATCH] mm: optimize numa policy handling in slab allocator

2006-01-18 19:20:18 -08:00

mempool.c

[PATCH] gfp_t: mm/* (easy parts)

2005-10-28 08:16:47 -07:00

mincore.c

[PATCH] freepgt: sys_mincore ignore FIRST_USER_PGD_NR

2005-04-19 13:29:20 -07:00

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

[PATCH] unpaged: private write VM_RESERVED

2005-11-22 09:13:42 -08:00

mremap.c

[PATCH] move capable() to capability.h

2006-01-11 18:42:13 -08:00

msync.c

[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem

2006-01-09 15:59:24 -08:00

nommu.c

[PATCH] NOMMU: Make SYSV IPC SHM use ramfs facilities on NOMMU

2006-01-06 08:33:32 -08:00

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

[PATCH] mm: split page table lock

2005-10-29 21:40:42 -07:00

page-writeback.c

[PATCH] mm: dirty_exceeded speedup

2006-01-18 19:20:17 -08:00

pdflush.c

[PATCH] Swap Migration V5: PF_SWAPWRITE to allow writing to swap

2006-01-08 20:12:41 -08:00

prio_tree.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

readahead.c

[PATCH] add AOP_TRUNCATED_PAGE, prepend AOP_ to WRITEPAGE_ACTIVATE

2006-01-03 11:45:42 -08:00

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

[PATCH] slob: introduce the SLOB allocator

2006-01-08 20:13:41 -08:00

sparse.c

[PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros

2006-01-08 20:13:38 -08:00

swap_state.c

[PATCH] SwapMig: add_to_swap() avoid atomic allocations

2006-01-08 20:12:42 -08:00

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

[PATCH] temporarily disable swap token on memory pressure

2005-11-28 14:42:25 -08:00

tiny-shmem.c

[PATCH] do_truncate() call fix in tiny-shmem.c

2006-01-12 09:08:49 -08:00

truncate.c

[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem

2006-01-09 15:59:24 -08:00

util.c

[PATCH] slob: introduce mm/util.c for shared functions

2006-01-08 20:13:41 -08:00

vmalloc.c

[PATCH] kernel-doc: fix warnings in vmalloc.c

2005-11-07 07:53:56 -08:00

vmscan.c

[PATCH] zone_reclaim: minor fixes

2006-02-01 08:53:15 -08:00