diff options
| author |   Cody P Schafer <cody@linux.vnet.ibm.com> | 2013-07-03 15:01:29 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-03 16:07:26 -0700 |
| commit | c8e251fadc6220261f6e0c6b8a4f1cdf27626165 (patch) | |
| tree | 434ddbf9a6fd9e9f62e8d04e8d7be8a2a0e19a59 /tools/perf/scripts/python | |
| parent | mm/page_alloc: factor out setting of pcp->high and pcp->batch (diff) | |
mm/page_alloc: prevent concurrent updaters of pcp ->batch and ->high
Because we are going to rely upon a careful transision between old and new
->high and ->batch values using memory barriers and will remove
stop_machine(), we need to prevent multiple updaters from interweaving
their memory writes.
Add a simple mutex to protect both update loops.
Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Cc: Mel Gorman <mgorman@suse.de>
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 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions