Re: netback oops in Linux 3.14 / 3.15

[James Dingwall <james-xen@dingwall.me.uk>]

On Tue, Jun 10, 2014 at 07:42:57PM +0100, Zoltan Kiss wrote:
> It is very likely to be a recent issue, please apply this fix onto your 
> kernel:
> 
> http://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git/commit/drivers/net/xen-netback?id=59ae9fc67007da8b5aea7b0a31c3607745cfbfee
> 
> Zoli

Thanks for the pointer.  I have tested with 3.15 and it seems to have solved the issue I was experiencing.

James

> 
> On 10/06/14 19:20, James Dingwall wrote:
> > Hi,
> >
> > Under Linux 3.14.6 and 3.15 I am getting a BUG_ON() from netback in xenvif_rx_action().  Under 3.15 it is the line at
> > 629 which is triggering:
> >
> > BUG_ON(ring_slots_used > max_slots_needed);
> >
> > The conditions are a 3.15.0 dom0 with Xen 4.4.0, a guest domain running the same 3.15.0 kernel, an rsync in the guest
> > where the source filesystem is NFS mounted from the dom0.
> >
> > I have added a printk to log the values which is seen as the first line in the attached trace.  Is there an off-by-one
> > error in the calculation for max_slots_needed or is it worth adding some more printks to find out how the value was
> > calculated?
> >
> > Please let me know if any other information about my configuration is required.
> >
> > Thanks,
> > James
> >
> >
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xen.org
> > http://lists.xen.org/xen-devel
> >
> 

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James Dingwall
e: james@dingwall.me.uk
w: http://www.dingwall.me.uk/
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