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| author | Tejun Heo <tj@kernel.org> | 2018-04-26 14:29:05 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2018-04-26 14:29:05 -0700 |
| commit | 9a9e97b2f1f27ec70e3c138a790bd5627747d868 (patch) | |
| tree | 3478f3d670cdde6cd9023990c8ebce2e2ecd73a3 /Kconfig | |
| parent | 8f53470bab04229e93ff9e4c20338cc08b42b344 (diff) | |
| download | op-kernel-dev-9a9e97b2f1f27ec70e3c138a790bd5627747d868.zip op-kernel-dev-9a9e97b2f1f27ec70e3c138a790bd5627747d868.tar.gz | |
cgroup: Add memory barriers to plug cgroup_rstat_updated() race window
cgroup_rstat_updated() has a small race window where an updated
signaling can race with flush and could be lost till the next update.
This wasn't a problem for the existing usages, but we plan to use
rstat to track counters which need to be accurate.
This patch plugs the race window by synchronizing
cgroup_rstat_updated() and flush path with memory barriers around
cgroup_rstat_cpu->updated_next pointer.
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'Kconfig')
0 files changed, 0 insertions, 0 deletions
