From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755778AbZBCVVr (ORCPT ); Tue, 3 Feb 2009 16:21:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752725AbZBCVVg (ORCPT ); Tue, 3 Feb 2009 16:21:36 -0500 Received: from ipmail05.adl2.internode.on.net ([203.16.214.145]:30066 "EHLO ipmail05.adl2.internode.on.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751721AbZBCVVf (ORCPT ); Tue, 3 Feb 2009 16:21:35 -0500 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApoEAKNCiEl5LJ2q/2dsb2JhbADPa4QUBg X-IronPort-AV: E=Sophos;i="4.37,374,1231075800"; d="scan'208";a="309596300" Date: Wed, 4 Feb 2009 08:21:29 +1100 From: Dave Chinner To: Jamie Lokier Cc: Eric Sandeen , Andrew Morton , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, t-sato@yk.jp.nec.com Subject: Re: [PATCH V4] Allow SysRq emergency thaw to thaw frozen filesystems Message-ID: <20090203212129.GI24173@disturbed> Mail-Followup-To: Jamie Lokier , Eric Sandeen , Andrew Morton , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, t-sato@yk.jp.nec.com References: <496EB639.6090800@redhat.com> <4970E087.8020308@redhat.com> <4970E4FB.7040407@redhat.com> <20090130134009.02d4a576.akpm@linux-foundation.org> <498779D6.7010304@redhat.com> <20090203114829.GG11926@shareable.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090203114829.GG11926@shareable.org> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 03, 2009 at 11:48:29AM +0000, Jamie Lokier wrote: > Eric Sandeen wrote: > > The timeout thaw originally proposed did not get merged, but > > perhaps something like this would be useful in emergencies. > > > > For example, freeze /path/to/mountpoint may freeze your > > root filesystem if you forgot that you had that unmounted. > > If you don't have console access, you're just logged in remotely, is > there a way to do an emergency unthaw from a shell command? ^^^^^^ That's a freeze, right? ;) Anyway, I think you could use /proc/sysrq-trigger in that situation. Cheers, Dave. -- Dave Chinner david@fromorbit.com