linux-kernel - Re: [RFC] Restrict kernel spawning of threads to a specified set of cpus.

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Message-ID: <0000014117fb2ea3-ec97f4c4-344b-42c5-b27c-be876f723942-000000@email.amazonses.com>
Date:	Fri, 13 Sep 2013 15:40:40 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Peter Zijlstra <peterz@...radead.org>
cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Gilad Ben-Yossef <gilad@...yossef.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Mike Frysinger <vapier@...too.org>,
	linux-kernel@...r.kernel.org,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [RFC] Restrict kernel spawning of threads to a specified set of
 cpus.

Hmmm... usermodehelper is based on workqueues. I guess this will
ultimately come down to modify the workqueue behavior for
WORK_CPU_UNBOUND?

If WORK_CPU_UNBOUND could mean to limit process execution to the affinity
of kthreadd then we are fine.

That would also benefit many other workqueue events that may otherwise
disturb tickless cpus.



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