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Date:   Mon, 11 Mar 2019 13:14:02 -0400
From:   Johannes Weiner <hannes@cmpxchg.org>
To:     Roman Gushchin <guroan@gmail.com>
Cc:     linux-mm@kvack.org, kernel-team@fb.com,
        linux-kernel@vger.kernel.org, Tejun Heo <tj@kernel.org>,
        Rik van Riel <riel@surriel.com>,
        Michal Hocko <mhocko@kernel.org>, Roman Gushchin <guro@fb.com>
Subject: Re: [PATCH 1/5] mm: prepare to premature release of
 memcg->vmstats_percpu
Message-ID: <20190311171402.GA10823@cmpxchg.org>
References: <20190307230033.31975-1-guro@fb.com>
 <20190307230033.31975-2-guro@fb.com>
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On Thu, Mar 07, 2019 at 03:00:29PM -0800, Roman Gushchin wrote:
> Prepare to handle premature release of memcg->vmstats_percpu data.
> Currently it's a generic pointer which is expected to be non-NULL
> during the whole life time of a memcg. Switch over to the
> rcu-protected pointer, and carefully check it for being non-NULL.
> 
> This change is a required step towards dynamic premature release
> of percpu memcg data.
> 
> Signed-off-by: Roman Gushchin <guro@fb.com>

Acked-by: Johannes Weiner <hannes@cmpxchg.org>