From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762794AbXGFJBx (ORCPT ); Fri, 6 Jul 2007 05:01:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756414AbXGFJBn (ORCPT ); Fri, 6 Jul 2007 05:01:43 -0400 Received: from gate.crashing.org ([63.228.1.57]:47830 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758059AbXGFJBm (ORCPT ); Fri, 6 Jul 2007 05:01:42 -0400 Subject: Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to RAM pathway From: Benjamin Herrenschmidt To: "Rafael J. Wysocki" Cc: Oliver Neukum , Alan Stern , Miklos Szeredi , pavel@ucw.cz, paulus@samba.org, johannes@sipsolutions.net, linux-pm@lists.linux-foundation.org, linux-kernel@vger.kernel.org, mjg59@srcf.ucam.org In-Reply-To: <200707060913.24131.rjw@sisk.pl> References: <200707052337.27066.oliver@neukum.org> <200707060913.24131.rjw@sisk.pl> Content-Type: text/plain Date: Fri, 06 Jul 2007 18:59:13 +1000 Message-Id: <1183712354.3388.126.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2007-07-06 at 09:13 +0200, Rafael J. Wysocki wrote: > > The only reason (I know of) why we don't handle uninterruptible tasks in the > freezer is that we're afraid of the suspend process deadlocking with an > uninterruptible task holding a lock, but AFAICS the probability of such an > event is extremely small. What would deadlock specifically ? One of the drivers trying to acquire that lock ? It would be a driver bug then. > Also, the powermac suspend will deadlock in such cases, so the fact that > it doesn't deadlock means that they don't occur very often (if at all). Ben.