linux-kernel - Re: [RFC PATCH(Experimental) 0/4] Freezer based Cpu-hotplug

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Message-ID: <20070221194257.GD3732@elf.ucw.cz>
Date:	Wed, 21 Feb 2007 20:42:57 +0100
From:	Pavel Machek <pavel@....cz>
To:	Gautham R Shenoy <ego@...ibm.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, akpm@...l.org,
	paulmck@...ibm.com, mingo@...e.hu, vatsa@...ibm.com,
	dipankar@...ibm.com, venkatesh.pallipadi@...el.com,
	linux-kernel@...r.kernel.org, oleg@...sign.ru
Subject: Re: [RFC PATCH(Experimental) 0/4] Freezer based Cpu-hotplug

Hi!

> Rafael,
> On Sat, Feb 17, 2007 at 12:24:45PM +0100, Rafael J. Wysocki wrote:
> > 
> > Pavel, do you think we can remove the PF_NOFREEZE from bluetooth, BTW?
> 
> The create_workqueue by default marks the worker_threads to be
> non_freezable. For cpu hotplug, all workqueues can be frozen 
> except the "kthread" workqueue (which is single threaded, so won't 
> be frozen anyway).
> 
> And a quick cscope scan shows that only the "xfslogd" and "xfsdatad"
> are the only freezable workqueues. Any particular reason
> for not marking rest of the non-single_threaded workqueues freezeable ??

As I said, go ahead.

bluetooth has absolutely no business running while we are writing
suspend image to disk.

(First person suggesting
suspend-to-file-on-nfs-filesystem-mounted-over-GPRS-line-connected-over-bluetooth
will be punished by only getting bread and water till he implements
it).
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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