linux-kernel - Re: [PATCH 0/7] devcg: device cgroup extension for rdma resource

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Message-ID: <CAG53R5X5z-H15f1FzCFFqao=taYeHyJnXAZT2mPzAHYOkyq-_Q@mail.gmail.com>
Date:	Fri, 11 Sep 2015 21:56:31 +0530
From:	Parav Pandit <pandit.parav@...il.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	Doug Ledford <dledford@...hat.com>, cgroups@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-rdma@...r.kernel.org, lizefan@...wei.com,
	Johannes Weiner <hannes@...xchg.org>,
	Jonathan Corbet <corbet@....net>, james.l.morris@...cle.com,
	serge@...lyn.com, Haggai Eran <haggaie@...lanox.com>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Matan Barak <matanb@...lanox.com>, raindel@...lanox.com,
	akpm@...ux-foundation.org, linux-security-module@...r.kernel.org
Subject: Re: [PATCH 0/7] devcg: device cgroup extension for rdma resource

> If the resource isn't and the main goal is preventing runaway
> hogs, it'll be able to do that but is that the goal here?  For this to
> be actually useful for performance contended cases, it'd need higher
> level abstractions.
>

Resource run away by application can lead to (a) kernel and (b) other
applications left out with no resources situation.
Both the problems are the target of this patch set by accounting via cgroup.

Performance contention can be resolved with higher level user space,
which will tune it.
Threshold and fail counters are on the way in follow on patch.

> Thanks.
>
> --
> tejun
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