linux-kernel - Re: [PATCH v2 6/6] mm: refactor memcg_hotplug_cpu_dead() to use memcg_flush_offline

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Date:   Wed, 13 Mar 2019 18:23:35 +0000
From:   Roman Gushchin <guro@...com>
To:     Johannes Weiner <hannes@...xchg.org>
CC:     Roman Gushchin <guroan@...il.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Kernel Team <Kernel-team@...com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Tejun Heo <tj@...nel.org>, Rik van Riel <riel@...riel.com>,
        Michal Hocko <mhocko@...nel.org>
Subject: Re: [PATCH v2 6/6] mm: refactor memcg_hotplug_cpu_dead() to use
 memcg_flush_offline_percpu()

On Wed, Mar 13, 2019 at 12:07:49PM -0400, Johannes Weiner wrote:
> On Tue, Mar 12, 2019 at 03:34:04PM -0700, Roman Gushchin wrote:
> > @@ -2180,50 +2179,8 @@ static int memcg_hotplug_cpu_dead(unsigned int cpu)
> > +	for_each_mem_cgroup(memcg)
> > +		memcg_flush_offline_percpu(memcg, get_cpu_mask(cpu));
> 
> cpumask_of(cpu) is the official API function, with kerneldoc and
> everything. I think get_cpu_mask() is just an implementation helper.
> 
> [hannes@...puter linux]$ git grep cpumask_of | wc -l
> 400
> [hannes@...puter linux]$ git grep get_cpu_mask | wc -l
> 20
> 
> Otherwise, looks good to me!

Fixed in v3.

Thank you!