Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751994Ab3IRNwm (ORCPT ); Wed, 18 Sep 2013 09:52:42 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:34377 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751511Ab3IRNwl (ORCPT ); Wed, 18 Sep 2013 09:52:41 -0400 Date: Wed, 18 Sep 2013 14:52:39 +0100 From: Al Viro To: Andrew Savchenko Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, suspend-devel@lists.sourceforge.net Subject: Re: [BUG] 3.7-rc regression bisected: s2disk fails to resume image: Processes could not be frozen, cannot continue resuming Message-ID: <20130918135239.GL13318@ZenIV.linux.org.uk> References: <20130812234415.7db639bb0d664e56b6ab2ab2@gmail.com> <20130827074843.ba1b6f62cc0a6dca8e47c06c@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130827074843.ba1b6f62cc0a6dca8e47c06c@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1277 Lines: 26 On Tue, Aug 27, 2013 at 07:48:43AM +0400, Andrew Savchenko wrote: > > Additional (but probably useless) information on this bug may be found > > here: https://forums.gentoo.org/viewtopic-p-7371120.html Something's very fishy there: [quote] Digging into suspend-utils code shows that the following ioctl fails on "/dev/snapshot": Code: ioctl(dev, _IO(3, 1), 0); [end quote] but that's _not_ anything freeze-related - that's HDIO_GETGEO, and with zero as last argument it will fail, no matter what. With EFAULT, if nothing else... Which ioctl() it really is? A bit further down you write "I modified suspend code to see errno, so freeze on /dev/snapshot fails [with EAGAIN]", so you have isolated the call in question. Could you quote the actual code? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/