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Date:   Mon, 12 Jul 2021 14:31:27 -0400
From:   Johannes Weiner <hannes@cmpxchg.org>
To:     Suren Baghdasaryan <surenb@google.com>
Cc:     tj@kernel.org, mhocko@kernel.org, vdavydov.dev@gmail.com,
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        linux-mm@kvack.org, kernel-team@android.com
Subject: Re: [PATCH v2 1/1] mm, memcg: inline mem_cgroup_{charge/uncharge} to
 improve disabled memcg config
Message-ID: <YOyKfySwuBfgtEvW@cmpxchg.org>
References: <20210709171554.3494654-1-surenb@google.com>
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On Fri, Jul 09, 2021 at 10:15:54AM -0700, Suren Baghdasaryan wrote:
> Inline mem_cgroup_{charge/uncharge} and mem_cgroup_uncharge_list functions
> functions to perform mem_cgroup_disabled static key check inline before
> calling the main body of the function. This minimizes the memcg overhead
> in the pagefault and exit_mmap paths when memcgs are disabled using
> cgroup_disable=memory command-line option.
> This change results in ~0.4% overhead reduction when running PFT test
> comparing {CONFIG_MEMCG=n} against {CONFIG_MEMCG=y, cgroup_disable=memory}
> configurationon on an 8-core ARM64 Android device.
> 
> Signed-off-by: Suren Baghdasaryan <surenb@google.com>

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

Thanks!