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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-07 10:11:41 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-07 10:11:41 -0800 |
| commit | 1fc1cd8399ab5541a488a7e47b2f21537dd76c2d (patch) | |
| tree | 8096fd360f6746e6f7c852a7f070fa1bf6f93266 /kernel/cgroup/rstat.c | |
| parent | abf7c3d8ddea3b43fe758590791878e1fd88ac47 (diff) | |
| parent | 6a613d24effcb875271b8a1c510172e2d6eaaee8 (diff) | |
Merge branch 'for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo:
- Oleg's pids controller accounting update which gets rid of rcu delay
in pids accounting updates
- rstat (cgroup hierarchical stat collection mechanism) optimization
- Doc updates
* 'for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cpuset: remove unused task_has_mempolicy()
cgroup, rstat: Don't flush subtree root unless necessary
cgroup: add documentation for pids.events file
Documentation: cgroup-v2: eliminate markup warnings
MAINTAINERS: Update cgroup entry
cgroup/pids: turn cgroup_subsys->free() into cgroup_subsys->release() to fix the accounting
Diffstat (limited to 'kernel/cgroup/rstat.c')
| -rw-r--r-- | kernel/cgroup/rstat.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/cgroup/rstat.c b/kernel/cgroup/rstat.c index d503d1a9007c..bb95a35e8c2d 100644 --- a/kernel/cgroup/rstat.c +++ b/kernel/cgroup/rstat.c @@ -87,7 +87,6 @@ static struct cgroup *cgroup_rstat_cpu_pop_updated(struct cgroup *pos, struct cgroup *root, int cpu) { struct cgroup_rstat_cpu *rstatc; - struct cgroup *parent; if (pos == root) return NULL; @@ -115,8 +114,8 @@ static struct cgroup *cgroup_rstat_cpu_pop_updated(struct cgroup *pos, * However, due to the way we traverse, @pos will be the first * child in most cases. The only exception is @root. */ - parent = cgroup_parent(pos); - if (parent && rstatc->updated_next) { + if (rstatc->updated_next) { + struct cgroup *parent = cgroup_parent(pos); struct cgroup_rstat_cpu *prstatc = cgroup_rstat_cpu(parent, cpu); struct cgroup_rstat_cpu *nrstatc; struct cgroup **nextp; @@ -140,9 +139,12 @@ static struct cgroup *cgroup_rstat_cpu_pop_updated(struct cgroup *pos, * updated stat. */ smp_mb(); + + return pos; } - return pos; + /* only happens for @root */ + return NULL; } /* see cgroup_rstat_flush() */ |