linux-kernel - Re: [PATCH 1/1] usermodehelper: kill ____call_usermodehelper()->set_cpus_allowed

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Message-ID: <20131206145322.GB2674@redhat.com>
Date:	Fri, 6 Dec 2013 15:53:22 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Tejun Heo <htejun@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <peterz@...radead.org>, zhang.yi20@....com.cn,
	lkml <linux-kernel@...r.kernel.org>,
	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH 1/1] usermodehelper: kill
	____call_usermodehelper()->set_cpus_allowed_ptr()

On 12/05, Christoph Lameter wrote:
>
> On Thu, 5 Dec 2013, Oleg Nesterov wrote:
>
> > Perhaps, I simply do not know what the users want.
>
> We would like to control OS spawning of threads and restrict them to a
> limited set of cpus so that the other processors can do latency sensitive
> work without being impacted by creation of kernel threads etc.

This probably means that Tejun's "default attributes which are inherited
by all workqueues" suggestion was right.

Oleg.

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