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authorVladimir Davydov <vdavydov@parallels.com>2014-12-12 16:55:15 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-13 12:42:47 -0800
commit6f185c290edec576a2cccd6670e5b8e02e6f04db (patch)
tree433e23f2887bfb8889314dd8a690b52abda771f3 /include
parent4e701d7b37789d1aeb0015210b373912e5d30733 (diff)
downloadlinux-6f185c290edec576a2cccd6670e5b8e02e6f04db.tar.bz2
memcg: turn memcg_kmem_skip_account into a bit field
It isn't supposed to stack, so turn it into a bit-field to save 4 bytes on the task_struct. Also, remove the memcg_stop/resume_kmem_account helpers - it is clearer to set/clear the flag inline. Regarding the overwhelming comment to the helpers, which is removed by this patch too, we already have a compact yet accurate explanation in memcg_schedule_cache_create, no need in yet another one. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> 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/sched.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 55f5ee7cc3d3..4cfdbcf8cf56 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1364,6 +1364,10 @@ struct task_struct {
unsigned sched_reset_on_fork:1;
unsigned sched_contributes_to_load:1;
+#ifdef CONFIG_MEMCG_KMEM
+ unsigned memcg_kmem_skip_account:1;
+#endif
+
unsigned long atomic_flags; /* Flags needing atomic access. */
pid_t pid;
@@ -1679,8 +1683,7 @@ struct task_struct {
/* bitmask and counter of trace recursion */
unsigned long trace_recursion;
#endif /* CONFIG_TRACING */
-#ifdef CONFIG_MEMCG /* memcg uses this to do batch job */
- unsigned int memcg_kmem_skip_account;
+#ifdef CONFIG_MEMCG
struct memcg_oom_info {
struct mem_cgroup *memcg;
gfp_t gfp_mask;