linux-kernel - Re: 2.6.21-rc5-mm1

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Date:	Wed, 28 Mar 2007 22:49:47 +0200
From:	Mariusz Kozłowski <m.kozlowski@...land.pl>
To:	Adrian Bunk <bunk@...sta.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, john stultz <johnstul@...ibm.com>
Subject: Re: 2.6.21-rc5-mm1

Hello,

> > > 	I run 2.6.21-rc4-mm1 with no hangs for a week.
> > > Then when 2.6.21-rc5-mm1 showed up so I switched to it. Unfortunately
> > > today my laptop hunged twice in a similar way as described here:
> > > 
> > > http://www.ussg.iu.edu/hypermail/linux/kernel/0703.0/index.html#1165
> > 
> > It's not good that we went backwards between those two releases.
> > 
> > > The difference is that it happened when I closed the lid in my laptop.
> > > When reopend it the box was frozen (ACPI?). Again disk I/O was dead
> > > so nothing was found in syslog.
> > 
> > Adrian, does this look like any of the bugs whcih you're monitoring?
> >...
> 
> Is it also present in 2.6.21-rc5?

Don't know. I usualy test -mm series. Will test tommorow and let you know
after some reasonable uptime.

> Is it also present with CONFIG_NO_HZ=n?

Don't know. Did not try recently. Will let you know.

It takes time as these hangs are not easy to trigger. With 2.6.21-rc2-mm1
it was easy -> push the system and watch it die in minutes. With
2.6.21-rc5-mm1 it takes hours (3 hangs in ~15 hours) and not sure how to
trigger it. It just happens from time to time.

> cu
> Adrian

Regards,

	Mariusz Kozlowski
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