linux-kernel - Re: [PATCH] mm: memcontrol: add file_thp, shmem

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Message-ID: <alpine.DEB.2.23.453.2010221100150.1331349@chino.kir.corp.google.com>
Date:   Thu, 22 Oct 2020 11:00:32 -0700 (PDT)
From:   David Rientjes <rientjes@...gle.com>
To:     Johannes Weiner <hannes@...xchg.org>
cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>, linux-mm@...ck.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com
Subject: Re: [PATCH] mm: memcontrol: add file_thp, shmem_thp to memory.stat

On Thu, 22 Oct 2020, Johannes Weiner wrote:

> As huge page usage in the page cache and for shmem files proliferates
> in our production environment, the performance monitoring team has
> asked for per-cgroup stats on those pages.
> 
> We already track and export anon_thp per cgroup. We already track file
> THP and shmem THP per node, so making them per-cgroup is only a matter
> of switching from node to lruvec counters. All callsites are in places
> where the pages are charged and locked, so page->memcg is stable.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>

Acked-by: David Rientjes <rientjes@...gle.com>

Nice!