linux-kernel - Re: [2.6.27-rc6 regression] Intermittent boot problem with 2.6.27-rc6

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Date:	Wed, 17 Sep 2008 11:55:58 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
Cc:	Ravikiran G Thirumalai <kiran@...lex86.org>,
	linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	torvalds@...ux-foundation.org
Subject: Re: [2.6.27-rc6 regression] Intermittent boot problem with
	2.6.27-rc6


* Zhang, Yanmin <yanmin_zhang@...ux.intel.com> wrote:

> 
> On Tue, 2008-09-16 at 13:04 -0700, Ravikiran G Thirumalai wrote:
> > Hi,
> > Booting 2.6.27-rc6, or the current Linus' git on large x86_64 NUMA wedges
> > intermittently.  This happens on machines with more than 4 NUMA nodes.  The
> > same kernel boots on similar hardware with fewer NUMA nodes (or boards).
> > 2.6.27-rc3 seemed to boot well on similar configurations, so looks like a
> > regression crept in between 2.6.27-rc3 and rc6.
> > 
> > I am trying a few things -- commandline options to eliminate popular
> > suspects (such as unsynced tsc clocksources)  as well as git bisect, but
> > wanted to report the regression in the meanwhile.
> > Here's the dmesg of a 24 core 6 node wedged system.
> Because the git doesn't include my patch. Pls. try it.
> 
> http://marc.info/?l=linux-kernel&m=122093094701219&w=2

it's queued up already, will send a pull request later today.

	Ingo
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