On Thu, 2012-07-19 at 09:05 -0400, Steven Rostedt wrote: 

On Thu, 2012-07-19 at 06:00 +0200, Mike Galbraith wrote:

quoted

On Wed, 2012-07-18 at 18:39 -0400, Steven Rostedt wrote:

quoted

Please test the patches too.

Your hotplug stress test script made x3550 M3 box fall over.  It took a
bit, but down she went.  64 core test box fell over quickly, but that's
very far from virgin source.. seems to be the same though.

Thanks for the report. I know a few areas in the hotplug code that can
still deadlock (but are hard to hit). But there's no easy fix for them.
Basically, the only thing we can do is redesign cpu hotplug (I think
someone is already trying to do that ;-).

Every kernel I've fed you script to has died sooner or later, so I wish
him fair sailing.  Here there be sea monsters ;-)

-Mike