From: Andrew Morton <akpm@linux-foundation.org>
To: Dan Schatzberg <dschatzberg@fb.com>
Cc: Tejun Heo <tj@kernel.org>, Li Zefan <lizefan@huawei.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
<linux-kernel@vger.kernel.org>, <cgroups@vger.kernel.org>
Subject: Re: [PATCH] psi: Expose pressure metrics on root cgroup
Date: Fri, 10 May 2019 14:16:59 -0700 [thread overview]
Message-ID: <20190510141659.08f58679c2eb3d321092dc23@linux-foundation.org> (raw)
In-Reply-To: <20190510174938.3361741-1-dschatzberg@fb.com>
On Fri, 10 May 2019 10:49:34 -0700 Dan Schatzberg <dschatzberg@fb.com> wrote:
> Pressure metrics are already recorded and exposed in procfs for the
> entire system, but any tool which monitors cgroup pressure has to
> special case the root cgroup to read from procfs. This patch exposes
> the already recorded pressure metrics on the root cgroup.
>
Documentation/admin-guide/cgroup-v2.rst says "A read-only nested-key
file which exists on non-root cgroups".
Documentation/accounting/psi.txt could do woth some clarification as
well.
prev parent reply other threads:[~2019-05-10 21:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-10 17:49 Dan Schatzberg
2019-05-10 18:23 ` Johannes Weiner
2019-05-10 21:16 ` Andrew Morton [this message]
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