From: Shakeel Butt <shakeelb@google.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Roman Gushchin <guro@fb.com>, Linux MM <linux-mm@kvack.org>,
Johannes Weiner <hannes@cmpxchg.org>,
David Rientjes <rientjes@google.com>,
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
Tejun Heo <tj@kernel.org>,
kernel-team@fb.com, LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Stephen Rothwell <sfr@canb.auug.org.au>
Subject: Re: [PATCH 1/3] mm: introduce mem_cgroup_put() helper
Date: Tue, 31 Jul 2018 07:58:00 -0700 [thread overview]
Message-ID: <CALvZod75t+uK=FDtpuBCMZCk7cb4vQMy7DpXQ53Aj7ZLiYsTQQ@mail.gmail.com> (raw)
In-Reply-To: <20180731084509.GE4557@dhcp22.suse.cz>
On Tue, Jul 31, 2018 at 1:45 AM Michal Hocko <mhocko@kernel.org> wrote:
>
> On Mon 30-07-18 11:00:58, Roman Gushchin wrote:
> > Introduce the mem_cgroup_put() helper, which helps to eliminate guarding
> > memcg css release with "#ifdef CONFIG_MEMCG" in multiple places.
>
> Is there any reason for this to be a separate patch? I usually do not
> like to add helpers without their users because this makes review
> harder. This one is quite trivial to fit into Patch3 easilly.
>
The helper function introduced in this change is also used in the
remote charging patches, so, I asked Roman to separate this change out
and thus can be merged independently.
Shakeel
> > Link: http://lkml.kernel.org/r/20180623000600.5818-2-guro@fb.com
> > Signed-off-by: Roman Gushchin <guro@fb.com>
> > Reviewed-by: Shakeel Butt <shakeelb@google.com>
> > Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
> > Cc: Shakeel Butt <shakeelb@google.com>
> > Cc: Johannes Weiner <hannes@cmpxchg.org>
> > Cc: Michal Hocko <mhocko@kernel.org>
> > Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> > Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
> > ---
> > include/linux/memcontrol.h | 9 +++++++++
> > 1 file changed, 9 insertions(+)
> >
> > diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
> > index 6c6fb116e925..e53e00cdbe3f 100644
> > --- a/include/linux/memcontrol.h
> > +++ b/include/linux/memcontrol.h
> > @@ -375,6 +375,11 @@ struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){
> > return css ? container_of(css, struct mem_cgroup, css) : NULL;
> > }
> >
> > +static inline void mem_cgroup_put(struct mem_cgroup *memcg)
> > +{
> > + css_put(&memcg->css);
> > +}
> > +
> > #define mem_cgroup_from_counter(counter, member) \
> > container_of(counter, struct mem_cgroup, member)
> >
> > @@ -837,6 +842,10 @@ static inline bool task_in_mem_cgroup(struct task_struct *task,
> > return true;
> > }
> >
> > +static inline void mem_cgroup_put(struct mem_cgroup *memcg)
> > +{
> > +}
> > +
> > static inline struct mem_cgroup *
> > mem_cgroup_iter(struct mem_cgroup *root,
> > struct mem_cgroup *prev,
> > --
> > 2.14.4
> >
>
> --
> Michal Hocko
> SUSE Labs
next prev parent reply other threads:[~2018-07-31 14:58 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-30 18:00 [PATCH 0/3] introduce memory.oom.group Roman Gushchin
2018-07-30 18:00 ` [PATCH 1/3] mm: introduce mem_cgroup_put() helper Roman Gushchin
2018-07-31 8:45 ` Michal Hocko
2018-07-31 14:58 ` Shakeel Butt [this message]
2018-08-01 5:53 ` Michal Hocko
2018-08-01 17:31 ` Johannes Weiner
2018-07-30 18:00 ` [PATCH 2/3] mm, oom: refactor oom_kill_process() Roman Gushchin
2018-08-01 17:32 ` Johannes Weiner
2018-07-30 18:01 ` [PATCH 3/3] mm, oom: introduce memory.oom.group Roman Gushchin
2018-07-31 9:07 ` Michal Hocko
2018-08-01 1:14 ` Roman Gushchin
2018-08-01 5:55 ` Michal Hocko
2018-08-01 17:48 ` Johannes Weiner
2018-08-01 17:50 ` Johannes Weiner
2018-07-31 1:49 ` [PATCH 0/3] " David Rientjes
2018-07-31 15:54 ` Johannes Weiner
2018-07-31 23:51 ` Roman Gushchin
2018-08-01 21:51 ` David Rientjes
2018-08-01 22:47 ` Roman Gushchin
2018-08-06 21:34 ` David Rientjes
2018-08-07 0:30 ` Roman Gushchin
2018-08-07 22:34 ` David Rientjes
2018-08-08 10:59 ` Michal Hocko
2018-08-09 20:10 ` David Rientjes
2018-08-10 7:03 ` Michal Hocko
2018-08-19 23:26 ` cgroup aware oom killer (was Re: [PATCH 0/3] introduce memory.oom.group) David Rientjes
2018-08-20 19:05 ` Roman Gushchin
2018-08-02 8:00 ` [PATCH 0/3] introduce memory.oom.group Michal Hocko
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