diff options
| 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 /include/linux/mfd/git:/ssh:/git@git.zx2c4.com | |
| parent | cgroup: Add cgroup_subsys->css_rstat_flush() (diff) | |
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 'include/linux/mfd/git:/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions