Re: cpu hotplug support broken in 2.6.23-rc3

[Rafael J. Wysocki]

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@xxxxxx> 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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