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Message-ID: <1633441528.1498131283163868227.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.com>
Date:	Mon, 30 Aug 2010 06:24:28 -0400 (EDT)
From:	CAI Qian <caiqian@...hat.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	torvalds@...ux-foundation.org, linux-next@...r.kernel.org,
	kexec <kexec@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: kdump regression compared to v2.6.35


----- "Tejun Heo" <tj@...nel.org> 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@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/kexec
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