Re: [Xen-devel] BUG: using smp_processor_id() in preemptible [00000000] code: blkback.1.xvdb/9138 caller is decrease_reservation

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Wed, 11 Sep 2013, Stefano Stabellini wrote:
> On Wed, 11 Sep 2013, Wei Liu wrote:
> > On Wed, Sep 11, 2013 at 06:15:09PM +0100, Stefano Stabellini wrote:
> > [...]
> > > > Spoke too soon, starting a guest is fixed now, shutting it down oopses:
> > > > 
> > > > [  910.980798] vpn_bridge: port 1(vif13.0) entered disabled state
> > > > [  910.988352] vpn_bridge: port 1(vif13.0) entered disabled state
> > > > [  910.995427] device vif13.0 left promiscuous mode
> > > > [  911.001821] vpn_bridge: port 1(vif13.0) entered disabled state
> > > > [  911.364617] ------------[ cut here ]------------
> > > > [  911.371022] kernel BUG at drivers/xen/balloon.c:365!
> > > 
> > > That's a different issue, it seems to be the same one found by Wei and
> > > addressed by "xen/balloon: check whether a page is pointed to scratch
> > > page MFN".
> > > 
> > > However the patch was never committed as the last update was missing.
> > > 
> > 
> > In case Sander pick up the wrong patch:
> > 
> > That will never get committed because we took the other path, which is
> > removing the BUG_ON, which is the exact the same patch you provided
> > below.
> > 
> > Konrad might have forgotten to queue it up.
> 
> I think he did (as did I).
> Do you have a link?

No worries, I found it. The issue was that you didn't CC neither me nor
Konrad.

I am adding it to the queue right now. Tomorrow if it passes linux-next
overnight testing, I'll send a pull request.

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