linux-kernel - Re: [PATCH] kthread: Don't depend on work queues

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Message-ID: <20070411112105.GA24813@in.ibm.com>
Date:	Wed, 11 Apr 2007 16:51:05 +0530
From:	Gautham R Shenoy <ego@...ibm.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Oleg Nesterov <oleg@...sign.ru>,
	Davide Libenzi <davidel@...ilserver.org>,
	Jan Engelhardt <jengelh@...ux01.gwdg.de>,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Robin Holt <holt@....com>, Roland McGrath <roland@...hat.com>,
	"Serge E. Hallyn" <serge@...lyn.com>, linux-kernel@...r.kernel.org,
	vatsa@...ibm.com
Subject: Re: [PATCH] kthread: Don't depend on work queues

On Wed, Apr 11, 2007 at 12:13:34PM +0200, Rafael J. Wysocki wrote:
> 
> It should be calling try_to_freeze() somewhere anyway.  We may need to freeze
> all tasks in some cases.

How about
for (;;) {
	try_to_freeze();

?

This change allows us to make all the worker threads freezeable by default.
>From cpu-hotplug perspective, helper_wq was the only singlethreaded
non-freezeable workqueue.

> 
> Greetings,
> Rafael
> -

Thanks and Regards
gautham.
-- 
Gautham R Shenoy
Linux Technology Center
IBM India.
"Freedom comes with a price tag of responsibility, which is still a bargain,
because Freedom is priceless!"
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