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

To: Christophe Saout <christophe@xxxxxxxx>
Subject: Re: [Xen-devel] pv_ops dom0 BUG in xen_flush_tlb_others
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Wed, 04 Mar 2009 17:37:19 -0800
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Christophe Saout wrote:
Hi,

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.

   J

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