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42a9fdbb12
linux/mm
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Christoph Lameter 42a9fdbb12 SLUB: Optimize cacheline use for zeroing 
We touch a cacheline in the kmem_cache structure for zeroing to get the
size. However, the hot paths in slab_alloc and slab_free do not reference
any other fields in kmem_cache, so we may have to just bring in the
cacheline for this one access.

Add a new field to kmem_cache_cpu that contains the object size. That
cacheline must already be used in the hotpaths. So we save one cacheline
on every slab_alloc if we zero.

We need to update the kmem_cache_cpu object size if an aliasing operation
changes the objsize of an non debug slab.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16 09:43:01 -07:00
..
allocpercpu.c Slab allocators: Replace explicit zeroing with __GFP_ZERO 2007-07-17 10:23:02 -07:00
backing-dev.c
bootmem.c
bounce.c Drop 'size' argument from bio_endio and bi_end_io 2007-10-10 09:25:57 +02:00
fadvise.c
filemap_xip.c mm: write iovec cleanup 2007-10-16 09:42:54 -07:00
filemap.c fs: remove some AOP_TRUNCATED_PAGE 2007-10-16 09:42:58 -07:00
fremap.c fix VM_CAN_NONLINEAR check in sys_remap_file_pages 2007-10-08 12:58:14 -07:00
highmem.c
hugetlb.c flush icache before set_pte() on ia64: flush icache at set_pte 2007-10-16 09:42:59 -07:00
internal.h
Kconfig vmemmap: generify initialisation via helpers 2007-10-16 09:42:51 -07:00
madvise.c
Makefile Generic Virtual Memmap support for SPARSEMEM 2007-10-16 09:42:51 -07:00
memory_hotplug.c Memoryless nodes: introduce mask of nodes with memory 2007-10-16 09:42:58 -07:00
memory.c flush icache before set_pte() on ia64: flush icache at set_pte 2007-10-16 09:42:59 -07:00
mempolicy.c memoryless nodes: fixup uses of node_online_map in generic code 2007-10-16 09:42:59 -07:00
mempool.c Slab allocators: Replace explicit zeroing with __GFP_ZERO 2007-07-17 10:23:02 -07:00
migrate.c flush icache before set_pte() on ia64: flush icache at set_pte 2007-10-16 09:42:59 -07:00
mincore.c
mlock.c
mmap.c fix NULL pointer dereference in __vm_enough_memory() 2007-08-22 19:52:45 -07:00
mmzone.c
mprotect.c flush icache before set_pte() on ia64: flush icache at set_pte 2007-10-16 09:42:59 -07:00
mremap.c mm: variable length argument support 2007-07-19 10:04:45 -07:00
msync.c
nommu.c fix NULL pointer dereference in __vm_enough_memory() 2007-08-22 19:52:45 -07:00
oom_kill.c Memoryless nodes: OOM: use N_HIGH_MEMORY map instead of constructing one on the fly 2007-10-16 09:42:58 -07:00
page_alloc.c mm/page_alloc.c: make code static 2007-10-16 09:43:01 -07:00
page_io.c Drop 'size' argument from bio_endio and bi_end_io 2007-10-10 09:25:57 +02:00
page-writeback.c memoryless nodes: fixup uses of node_online_map in generic code 2007-10-16 09:42:59 -07:00
pdflush.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
prio_tree.c
quicklist.c
readahead.c mm: buffered write cleanup 2007-10-16 09:42:54 -07:00
rmap.c flush icache before set_pte() on ia64: flush icache at set_pte 2007-10-16 09:42:59 -07:00
shmem_acl.c
shmem.c Group short-lived and reclaimable kernel allocations 2007-10-16 09:43:00 -07:00
slab.c Group short-lived and reclaimable kernel allocations 2007-10-16 09:43:00 -07:00
slob.c Slab allocators: fail if ksize is called with a NULL parameter 2007-10-16 09:42:53 -07:00
slub.c SLUB: Optimize cacheline use for zeroing 2007-10-16 09:43:01 -07:00
sparse-vmemmap.c vmemmap: generify initialisation via helpers 2007-10-16 09:42:51 -07:00
sparse.c Fix corruption of memmap on IA64 SPARSEMEM when mem_section is not a power of 2 2007-10-16 09:43:00 -07:00
swap_state.c mm: clarify __add_to_swap_cache locking 2007-10-16 09:42:53 -07:00
swap.c mm: use pagevec to rotate reclaimable page 2007-10-16 09:42:54 -07:00
swapfile.c Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION 2007-07-29 16:45:38 -07:00
thrash.c
tiny-shmem.c
truncate.c mm: merge populate and nopage into fault (fixes nonlinear) 2007-07-19 10:04:41 -07:00
util.c Slab allocators: fail if ksize is called with a NULL parameter 2007-10-16 09:42:53 -07:00
vmalloc.c Categorize GFP flags 2007-10-16 09:42:59 -07:00
vmscan.c make swappiness safer to use 2007-10-16 09:42:59 -07:00
vmstat.c Print out statistics in relation to fragmentation avoidance to /proc/pagetypeinfo 2007-10-16 09:43:00 -07:00