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Re: [Xen-devel] pv_ops dom0 BUG in xen_flush_tlb_others

from [Christophe Saout]

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To:	Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject:	Re: [Xen-devel] pv_ops dom0 BUG in xen_flush_tlb_others
From:	Christophe Saout <christophe@xxxxxxxx>
Date:	Thu, 05 Mar 2009 12:36:33 +0100
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Hi again,

> > > I started compiling a larger package and after I few minute the machine
> > > locked up with the following BUG.  It's the second time I observe this
> > > one, so it might be a race condition or something lurking here.
> > > (possibly not dom0 specific at all)
> > >
> > > The BUG() is triggered because the CPU mask is empty.  So maybe it's not
> > > a xen bug at all, just a weird occurence in the kernel -
> > > native_flush_tlb_others doesn't have such a check.
> >
> > Interesting.  I've never seen it trigger, but I think we can easily 
> > remove the test with no bad effects.
> 
> I just removed it.  Let's see whether the qt build gets through. :-)

Yes, happily compiling all night and still up and running without
anything suspicious in the logs.

        Christophe



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