From: Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
To: Vern Hao <haoxing990-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: mhocko-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
roman.gushchin-fxUVXftIFDnyG1zEObXtfA@public.gmane.org,
shakeelb-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org,
akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Xin Hao <vernhao-1Nz4purKYjRBDgjK7y7TUQ@public.gmane.org>
Subject: Re: [PATCH v3] mm: memcg: add THP swap out info for anonymous reclaim
Date: Wed, 13 Sep 2023 13:38:02 -0400 [thread overview]
Message-ID: <20230913173802.GA48476@cmpxchg.org> (raw)
In-Reply-To: <20230913164938.16918-1-vernhao-1Nz4purKYjRBDgjK7y7TUQ@public.gmane.org>
On Thu, Sep 14, 2023 at 12:49:37AM +0800, Vern Hao wrote:
> From: Xin Hao <vernhao-1Nz4purKYjRBDgjK7y7TUQ@public.gmane.org>
>
> At present, we support per-memcg reclaim strategy, however we do not
> know the number of transparent huge pages being reclaimed, as we know
> the transparent huge pages need to be splited before reclaim them, and
> they will bring some performance bottleneck effect. for example, when
> two memcg (A & B) are doing reclaim for anonymous pages at same time,
> and 'A' memcg is reclaiming a large number of transparent huge pages, we
> can better analyze that the performance bottleneck will be caused by 'A'
> memcg. therefore, in order to better analyze such problems, there add
> THP swap out info for per-memcg.
>
> Suggested-by: Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
> Signed-off-by: Xin Hao <vernhao-1Nz4purKYjRBDgjK7y7TUQ@public.gmane.org>
Acked-by: Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
WARNING: multiple messages have this Message-ID (diff)
From: Johannes Weiner <hannes@cmpxchg.org>
To: Vern Hao <haoxing990@gmail.com>
Cc: mhocko@kernel.org, roman.gushchin@linux.dev, shakeelb@google.com,
akpm@linux-foundation.org, cgroups@vger.kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Xin Hao <vernhao@tencent.com>
Subject: Re: [PATCH v3] mm: memcg: add THP swap out info for anonymous reclaim
Date: Wed, 13 Sep 2023 13:38:02 -0400 [thread overview]
Message-ID: <20230913173802.GA48476@cmpxchg.org> (raw)
In-Reply-To: <20230913164938.16918-1-vernhao@tencent.com>
On Thu, Sep 14, 2023 at 12:49:37AM +0800, Vern Hao wrote:
> From: Xin Hao <vernhao@tencent.com>
>
> At present, we support per-memcg reclaim strategy, however we do not
> know the number of transparent huge pages being reclaimed, as we know
> the transparent huge pages need to be splited before reclaim them, and
> they will bring some performance bottleneck effect. for example, when
> two memcg (A & B) are doing reclaim for anonymous pages at same time,
> and 'A' memcg is reclaiming a large number of transparent huge pages, we
> can better analyze that the performance bottleneck will be caused by 'A'
> memcg. therefore, in order to better analyze such problems, there add
> THP swap out info for per-memcg.
>
> Suggested-by: Johannes Weiner <hannes@cmpxchg.org>
> Signed-off-by: Xin Hao <vernhao@tencent.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
next prev parent reply other threads:[~2023-09-13 17:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-13 16:49 [PATCH v3] mm: memcg: add THP swap out info for anonymous reclaim Vern Hao
2023-09-13 16:49 ` Vern Hao
[not found] ` <20230913164938.16918-1-vernhao-1Nz4purKYjRBDgjK7y7TUQ@public.gmane.org>
2023-09-13 17:38 ` Johannes Weiner [this message]
2023-09-13 17:38 ` Johannes Weiner
2023-09-13 20:16 ` kernel test robot
2023-09-13 20:16 ` kernel test robot
2023-09-13 21:33 ` Johannes Weiner
2023-09-13 21:33 ` Johannes Weiner
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