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

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Date:	Wed, 21 Feb 2007 20:22:21 +0530
From:	Gautham R Shenoy <ego@...ibm.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	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,
	Pavel Machek <pavel@....cz>
Subject: Re: [RFC PATCH(Experimental) 0/4] Freezer based Cpu-hotplug

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 ??

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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