Re: CPU hotplug broken in 2.6.8-rc2 ?

[Nathan Lynch]

On Wed, 2004-08-04 at 05:06, Srivatsa Vaddagiri wrote:
> On Tue, Aug 03, 2004 at 04:07:20PM -0500, Nathan Lynch wrote:
> >                 BUG_ON(rq->nr_running != 0);
> > 
> > I can reproduce this on both ppc64 and i386.  Does anyone know why this
> > is happening?
> 
> I guess some task is still stuck with the dead CPU. Can you put a breakpoint on the BUG_ON 
> and see the ps output (in kdb) to see which task is that when you hit the breakpoint?

The task is always something like cc1 or sh from the build which is
running.

> 
> I will also try debugging the 2.6.8-rc2 CPU Hotplug woes as soon as I can.
> 

Well, I am seeing this with 2.6.8-rc2-mm2 -- with 2.6.8-rc2-bk13 (plus
the same patch) I cannot reproduce it; I have run the test for 12 hours
without problem.

Nathan

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