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From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: ego@in.ibm.com
Subject: Re: [PATCH] kthread: Don't depend on work queues
Date: Wed, 11 Apr 2007 16:44:52 +0200
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Cc: Oleg Nesterov <oleg@tv-sign.ru>, Andrew Morton <akpm@linux-foundation.org>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Davide Libenzi <davidel@xmailserver.org>,
       Jan Engelhardt <jengelh@linux01.gwdg.de>, Ingo Molnar <mingo@elte.hu>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Robin Holt <holt@sgi.com>, Roland McGrath <roland@redhat.com>,
       "Serge E. Hallyn" <serge@hallyn.com>, linux-kernel@vger.kernel.org,
       vatsa@in.ibm.com
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On Wednesday, 11 April 2007 15:31, Gautham R Shenoy wrote:
> On Wed, Apr 11, 2007 at 03:48:05PM +0400, Oleg Nesterov wrote:
> > On 04/11, Gautham R Shenoy wrote:
> > >
> > > 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();
> > > 
> > > ?
> > 
> > Why?
> 
> If some event (defintely NOT cpu hotplug) needs this thread frozen.

I didn't mean the CPU hotplug too, BTW, but I'm considering freezing all tasks
at the late stage of suspend (ie. after freezing devices).

Greetings,
Rafael