linux-kernel - Re: [PATCH 34/35] async: use workqueue for worker pool

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Message-ID: <25085.1277847455@redhat.com>
Date:	Tue, 29 Jun 2010 22:37:35 +0100
From:	David Howells <dhowells@...hat.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	dhowells@...hat.com, Arjan van de Ven <arjan@...ux.intel.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	torvalds@...ux-foundation.org, mingo@...e.hu,
	linux-kernel@...r.kernel.org, jeff@...zik.org,
	akpm@...ux-foundation.org, rusty@...tcorp.com.au,
	cl@...ux-foundation.org, oleg@...hat.com, axboe@...nel.dk,
	dwalker@...eaurora.org, stefanr@...6.in-berlin.de,
	florian@...kler.org, andi@...stfloor.org, mst@...hat.com,
	randy.dunlap@...cle.com, Arjan van de Ven <arjan@...radead.org>
Subject: Re: [PATCH 34/35] async: use workqueue for worker pool

Tejun Heo <tj@...nel.org> wrote:

> Hmmm... workqueue workers are bound to certain cpu, so if you schedule
> a work on a specific CPU, it will run there.

That's my main problem with using cmwq to replace slow-work.

> Once a cpu gets saturated, the issuing thread will be moved elsewhere.

Assuming that the issuing thread isn't bound by the condition specified in the
previous sentence...

David
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