Subject: Re: kdump regression compared to v2.6.35

From: CAI Qian <[email-masked]>
Date: Sun, 29 Aug 2010 23:42:53 -0400 (EDT)

----- "Tejun Heo" <[email-masked]> wrote:

> Hello,
> 
> On 08/29/2010 02:03 PM, CAI Qian wrote:
> > 
> > ----- "Tejun Heo" <[email-masked]> 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