summaryrefslogtreecommitdiffstats
path: root/include
diff options
context:
space:
mode:
authorTejun Heo <tj@kernel.org>2015-11-05 18:46:09 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-05 19:34:48 -0800
commit626ebc4100285be56fe3546f29b6afeb36b6871a (patch)
treec36a6c10a00ed6169d245c1589cb24ce7e2a2f28 /include
parent55e1ceaf2586ab11aafba798a6b9499dd7c14441 (diff)
downloadlinux-626ebc4100285be56fe3546f29b6afeb36b6871a.tar.bz2
memcg: flatten task_struct->memcg_oom
task_struct->memcg_oom is a sub-struct containing fields which are used for async memcg oom handling. Most task_struct fields aren't packaged this way and it can lead to unnecessary alignment paddings. This patch flattens it. * task.memcg_oom.memcg -> task.memcg_in_oom * task.memcg_oom.gfp_mask -> task.memcg_oom_gfp_mask * task.memcg_oom.order -> task.memcg_oom_order * task.memcg_oom.may_oom -> task.memcg_may_oom In addition, task.memcg_may_oom is relocated to where other bitfields are which reduces the size of task_struct. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Vladimir Davydov <vdavydov@parallels.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/memcontrol.h10
-rw-r--r--include/linux/sched.h13
2 files changed, 11 insertions, 12 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 3e3318ddfc0e..56174c7199ee 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -406,19 +406,19 @@ void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
static inline void mem_cgroup_oom_enable(void)
{
- WARN_ON(current->memcg_oom.may_oom);
- current->memcg_oom.may_oom = 1;
+ WARN_ON(current->memcg_may_oom);
+ current->memcg_may_oom = 1;
}
static inline void mem_cgroup_oom_disable(void)
{
- WARN_ON(!current->memcg_oom.may_oom);
- current->memcg_oom.may_oom = 0;
+ WARN_ON(!current->memcg_may_oom);
+ current->memcg_may_oom = 0;
}
static inline bool task_in_memcg_oom(struct task_struct *p)
{
- return p->memcg_oom.memcg;
+ return p->memcg_in_oom;
}
bool mem_cgroup_oom_synchronize(bool wait);
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 5423b9c82fee..17bf8b845aa0 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1473,7 +1473,9 @@ struct task_struct {
unsigned sched_reset_on_fork:1;
unsigned sched_contributes_to_load:1;
unsigned sched_migrated:1;
-
+#ifdef CONFIG_MEMCG
+ unsigned memcg_may_oom:1;
+#endif
#ifdef CONFIG_MEMCG_KMEM
unsigned memcg_kmem_skip_account:1;
#endif
@@ -1804,12 +1806,9 @@ struct task_struct {
unsigned long trace_recursion;
#endif /* CONFIG_TRACING */
#ifdef CONFIG_MEMCG
- struct memcg_oom_info {
- struct mem_cgroup *memcg;
- gfp_t gfp_mask;
- int order;
- unsigned int may_oom:1;
- } memcg_oom;
+ struct mem_cgroup *memcg_in_oom;
+ gfp_t memcg_oom_gfp_mask;
+ int memcg_oom_order;
#endif
#ifdef CONFIG_UPROBES
struct uprobe_task *utask;