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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-02-10 11:36:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-02-10 11:36:19 -0800 |
| commit | fb0dc5f129bc2d4763bdc237b8df0e1708c03e1e (patch) | |
| tree | 4c635f1ca11535c0072d2f10282a31d16979d639 /include | |
| parent | 9aece75c138d93bde79a2baeb9187a1109b4e952 (diff) | |
| parent | 9a2ddda572a002633a64b1ae5f4bc49cfcbf495f (diff) | |
Merge branch 'for-4.5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fixes from Tejun Heo:
- The destruction path of cgroup objects are asynchronous and
multi-staged and some of them ended up destroying parents before
children leading to failures in cpu and memory controllers. Ensure
that parents are always destroyed after children.
- cpuset mm node migration was performed synchronously while holding
threadgroup and cgroup mutexes and the recent threadgroup locking
update resulted in a possible deadlock. The migration is best effort
and shouldn't have been performed under those locks to begin with.
Made asynchronous.
- Minor documentation fix.
* 'for-4.5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
Documentation: cgroup: Fix 'cgroup-legacy' -> 'cgroup-v1'
cgroup: make sure a parent css isn't freed before its children
cgroup: make sure a parent css isn't offlined before its children
cpuset: make mm migration asynchronous
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/cgroup-defs.h | 6 | ||||
| -rw-r--r-- | include/linux/cpuset.h | 6 |
2 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h index 7f540f7f588d..789471dba6fb 100644 --- a/include/linux/cgroup-defs.h +++ b/include/linux/cgroup-defs.h @@ -127,6 +127,12 @@ struct cgroup_subsys_state { */ u64 serial_nr; + /* + * Incremented by online self and children. Used to guarantee that + * parents are not offlined before their children. + */ + atomic_t online_cnt; + /* percpu_ref killing and RCU release */ struct rcu_head rcu_head; struct work_struct destroy_work; diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h index 85a868ccb493..fea160ee5803 100644 --- a/include/linux/cpuset.h +++ b/include/linux/cpuset.h @@ -137,6 +137,8 @@ static inline void set_mems_allowed(nodemask_t nodemask) task_unlock(current); } +extern void cpuset_post_attach_flush(void); + #else /* !CONFIG_CPUSETS */ static inline bool cpusets_enabled(void) { return false; } @@ -243,6 +245,10 @@ static inline bool read_mems_allowed_retry(unsigned int seq) return false; } +static inline void cpuset_post_attach_flush(void) +{ +} + #endif /* !CONFIG_CPUSETS */ #endif /* _LINUX_CPUSET_H */ |