From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755322Ab0H3KZQ (ORCPT ); Mon, 30 Aug 2010 06:25:16 -0400 Received: from mx4-phx2.redhat.com ([209.132.183.25]:33078 "EHLO mx02.colomx.prod.int.phx2.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755245Ab0H3KZO (ORCPT ); Mon, 30 Aug 2010 06:25:14 -0400 Date: Mon, 30 Aug 2010 06:24:28 -0400 (EDT) From: CAI Qian To: Tejun Heo Cc: torvalds@linux-foundation.org, linux-next@vger.kernel.org, kexec , linux-kernel Message-ID: <1633441528.1498131283163868227.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.com> In-Reply-To: <4C7B6C07.6010800@kernel.org> Subject: Re: kdump regression compared to v2.6.35 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [10.5.5.72] X-Mailer: Zimbra 5.0.21_GA_3150.RHEL4_64 (ZimbraWebClient - FF3.0 (Linux)/5.0.21_GA_3150.RHEL4_64) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ----- "Tejun Heo" wrote: > Hello, > > On 08/30/2010 05:42 AM, CAI Qian wrote: > >> Hmmm... I can't reproduce it here. I wonder what the difference > is. > >> Can you please trigger sysrq-t after the boot is hung and post the > >> result? > > Sysrq keys did not work at this early stage of booting for me even > > adding sysrq_always_enabled. > > I see. I'll prepare a debug patch which tries to catch long > execution > delays in workqueue but in the meantime can you please turn on > hangcheck timer and see whether it triggers after the kernel hangs > during boot? Can't see any difference with hangcheck timer enabled. > Thanks. > > -- > tejun > > _______________________________________________ > kexec mailing list > kexec@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/kexec