From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754936AbZBCNbV (ORCPT ); Tue, 3 Feb 2009 08:31:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752417AbZBCNbM (ORCPT ); Tue, 3 Feb 2009 08:31:12 -0500 Received: from e38.co.us.ibm.com ([32.97.110.159]:48808 "EHLO e38.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751371AbZBCNbL (ORCPT ); Tue, 3 Feb 2009 08:31:11 -0500 Subject: Re: [PATCH V4] Allow SysRq emergency thaw to thaw frozen filesystems From: Dave Kleikamp To: Jamie Lokier Cc: Eric Sandeen , Andrew Morton , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, t-sato@yk.jp.nec.com In-Reply-To: <20090203114829.GG11926@shareable.org> 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> Content-Type: text/plain Date: Tue, 03 Feb 2009 07:31:07 -0600 Message-Id: <1233667867.30906.0.camel@norville.austin.ibm.com> Mime-Version: 1.0 X-Mailer: Evolution 2.24.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2009-02-03 at 11:48 +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? echo j > /proc/sysrq-trigger Shaggy -- David Kleikamp IBM Linux Technology Center