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| author | Tejun Heo | 2015-11-06 03:46:09 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2015-11-06 04:34:48 +0100 |
| commit | 626ebc4100285be56fe3546f29b6afeb36b6871a (patch) | |
| tree | c36a6c10a00ed6169d245c1589cb24ce7e2a2f28 /mm/memcontrol.c | |
| parent | mm/mmap.c: remove useless statement "vma = NULL" in find_vma() (diff) | |
| download | kernel-qcow2-linux-626ebc4100285be56fe3546f29b6afeb36b6871a.tar.gz kernel-qcow2-linux-626ebc4100285be56fe3546f29b6afeb36b6871a.tar.xz kernel-qcow2-linux-626ebc4100285be56fe3546f29b6afeb36b6871a.zip | |
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 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index c57c4423c688..47bd7f13f526 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1661,7 +1661,7 @@ static void memcg_oom_recover(struct mem_cgroup *memcg) static void mem_cgroup_oom(struct mem_cgroup *memcg, gfp_t mask, int order) { - if (!current->memcg_oom.may_oom) + if (!current->memcg_may_oom) return; /* * We are in the middle of the charge context here, so we @@ -1678,9 +1678,9 @@ static void mem_cgroup_oom(struct mem_cgroup *memcg, gfp_t mask, int order) * and when we know whether the fault was overall successful. */ css_get(&memcg->css); - current->memcg_oom.memcg = memcg; - current->memcg_oom.gfp_mask = mask; - current->memcg_oom.order = order; + current->memcg_in_oom = memcg; + current->memcg_oom_gfp_mask = mask; + current->memcg_oom_order = order; } /** @@ -1702,7 +1702,7 @@ static void mem_cgroup_oom(struct mem_cgroup *memcg, gfp_t mask, int order) */ bool mem_cgroup_oom_synchronize(bool handle) { - struct mem_cgroup *memcg = current->memcg_oom.memcg; + struct mem_cgroup *memcg = current->memcg_in_oom; struct oom_wait_info owait; bool locked; @@ -1730,8 +1730,8 @@ bool mem_cgroup_oom_synchronize(bool handle) if (locked && !memcg->oom_kill_disable) { mem_cgroup_unmark_under_oom(memcg); finish_wait(&memcg_oom_waitq, &owait.wait); - mem_cgroup_out_of_memory(memcg, current->memcg_oom.gfp_mask, - current->memcg_oom.order); + mem_cgroup_out_of_memory(memcg, current->memcg_oom_gfp_mask, + current->memcg_oom_order); } else { schedule(); mem_cgroup_unmark_under_oom(memcg); @@ -1748,7 +1748,7 @@ bool mem_cgroup_oom_synchronize(bool handle) memcg_oom_recover(memcg); } cleanup: - current->memcg_oom.memcg = NULL; + current->memcg_in_oom = NULL; css_put(&memcg->css); return true; } |