linux-kernel - Re: kdump regression compared to v2.6.35

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Message-ID: <1888320510.1487031283139773505.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.com>
Date:	Sun, 29 Aug 2010 23:42:53 -0400 (EDT)
From:	CAI Qian <caiqian@...hat.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	kexec <kexec@...ts.infradead.org>, linux-next@...r.kernel.org,
	torvalds@...ux-foundation.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 08/29/2010 02:03 PM, CAI Qian wrote:
> > 
> > ----- "Tejun Heo" <tj@...nel.org> wrote:
> > 
> >> On 08/29/2010 01:56 PM, CAI Qian wrote:
> >>> It is easy to reproduce by passing maxcpus=1 to the first kernel.
> >>
> >> Do you mean booting w/ maxcpus=1 hangs the first kernel even w/o
> >> kdump?
> > Yes, here was the log,
> 
> 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.
> Thanks.
> 
> -- 
> tejun
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