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| author | Vladimir Davydov <vdavydov@parallels.com> | 2014-12-12 16:55:15 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-13 12:42:47 -0800 |
| commit | 6f185c290edec576a2cccd6670e5b8e02e6f04db (patch) | |
| tree | 433e23f2887bfb8889314dd8a690b52abda771f3 /include/linux/sched.h | |
| parent | 4e701d7b37789d1aeb0015210b373912e5d30733 (diff) | |
| download | lwn-6f185c290edec576a2cccd6670e5b8e02e6f04db.tar.gz lwn-6f185c290edec576a2cccd6670e5b8e02e6f04db.zip | |
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/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 7 |
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; |