linux-kernel - query for idea about a kexec regression

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Message-ID: <20131027043023.GA18689@dhcp-16-126.nay.redhat.com>
Date:	Sun, 27 Oct 2013 12:30:23 +0800
From:	Dave Young <dyoung@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	kexec@...ts.infradead.org, x86@...r.kernel.org
Subject: query for idea about a kexec regression

Hi

While I testing efi runtime patches for kexec kernel, there's
2 machines kexec fails on them. It can be reproduced with
non-efi kernel, so it's not related to the patchset.

Problem is kexec kernel will immediatly reboot after below
kernel message:
smpboot: Booting Node   0, Processors  #   1

The latter CPUs were not printed.

nr_cpus=1 works, so there might be some bug on smp code.

Any idea or suspection acout some patches? This is not 100%
reproducible, to me it's about 30% thus it's hard to bisect.

Thanks
Dave
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