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Message-Id: <200708272359.32484.rjw@sisk.pl>
Date: Mon, 27 Aug 2007 23:59:31 +0200
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: Pavel Machek <pavel@....cz>
Cc: Jeff Chua <jeff.chua.linux@...il.com>, rusty@...tycorp.com.au,
vatsa@...ibm.com, zwane@....linux.org.uk,
kernel list <linux-kernel@...r.kernel.org>
Subject: Re: cpu hotplug support broken in 2.6.23-rc3
On Monday, 27 August 2007 23:32, Pavel Machek wrote:
> On Mon 2007-08-27 22:36:57, Jeff Chua wrote:
> > On 8/27/07, Pavel Machek <pavel@....cz> wrote:
> > > On Mon 2007-08-27 12:43:50, Pavel Machek wrote:
> > > > Hi!
> > > >
> > > > Trying to do few onlines/offlines reliably hangs my machine (thinkpad
> > > > x60, i386 architecture).
> >
> > I just 3 cycles of on-line/off-line on 2.6.23-rc3 on ThinkPad x60s,
> > and my system still survives.
>
> Can you try 20-or-so tests? Mine hangs randomly, so it survived 4 or
> so cycles at one point.
>
> ...or maybe difference is in the .config, or maybe I broken something
> in my kernel sources....
Well, something seems to be wrong with the CPU hotplug, but it's insanely
difficult to reproduce on my boxes.
I bet on one of the notifiers blocking while waiting on a frozen task.
Greetings,
Rafael
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