diff options
| author | Kirill A. Shutemov <[email protected]> | 2013-11-14 14:31:53 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2013-11-15 09:32:20 +0900 |
| commit | ea1e7ed33708c7a760419ff9ded0a6cb90586a50 (patch) | |
| tree | 553c0c4024639bf2b1706d144fd6bb8ada63861e /tools/perf/scripts/python | |
| parent | 539edb5846c740d78a8b6c2e43a99ca4323df68f (diff) | |
mm: create a separate slab for page->ptl allocation
If DEBUG_SPINLOCK and DEBUG_LOCK_ALLOC are enabled spinlock_t on x86_64
is 72 bytes. For page->ptl they will be allocated from kmalloc-96 slab,
so we loose 24 on each. An average system can easily allocate few tens
thousands of page->ptl and overhead is significant.
Let's create a separate slab for page->ptl allocation to solve this.
Signed-off-by: Kirill A. Shutemov <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions