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| author | Christoph Lameter <cl@linux.com> | 2014-04-07 22:39:42 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-07 23:36:14 (GMT) |
| commit | 88da03a67674bcd6e9ecf18a0a182cf1303056ba (patch) | |
| tree | f822c90ff7a8e62e6d7c3c82854b510786e7222b /lib/smp_processor_id.c | |
| parent | 3ed66e910c91eb914b5c1f2d434538fe68bb8a56 (diff) | |
| download | linux-88da03a67674bcd6e9ecf18a0a182cf1303056ba.tar.xz | |
slub: use raw_cpu_inc for incrementing statistics
Statistics are not critical to the operation of the allocation but
should also not cause too much overhead.
When __this_cpu_inc is altered to check if preemption is disabled this
triggers. Use raw_cpu_inc to avoid the checks. Using this_cpu_ops may
cause interrupt disable/enable sequences on various arches which may
significantly impact allocator performance.
[akpm@linux-foundation.org: add comment]
Signed-off-by: Christoph Lameter <cl@linux.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/smp_processor_id.c')
0 files changed, 0 insertions, 0 deletions