linux-kernel - Re: [RFC] workqueue: avoiding unbounded wq on isolated CPUs by default

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Message-ID: <1437153348.5860.32.camel@gmail.com>
Date:	Fri, 17 Jul 2015 19:15:48 +0200
From:	Mike Galbraith <umgwanakikbuti@...il.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	Daniel Bristot de Oliveira <bristot@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Lai Jiangshan <jiangshanlai@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Rik van Riel <riel@...hat.com>,
	"Luis Claudio R. Goncalves" <lclaudio@...g.org>
Subject: Re: [RFC] workqueue: avoiding unbounded wq on isolated CPUs by
 default

On Fri, 2015-07-17 at 11:27 -0400, Tejun Heo wrote:

> I'm just curious whether there was any specific reason we didn't do
> this before (ISTR people discussing it back then too).

I'm dead set against all this auto-presume nonsense fwtw  Allocating a
pool of no_hz_full _capable_ CPUs should not entice the kernel to make
any rash assumptions.  Let users do the button poking, they know what
they want, and when they want it.

	-Mike

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