Re: [Xen-devel] netback oops in Linux 3.14 / 3.15

[Zoltan Kiss <zoltan.kiss@xxxxxxxxxx>]

Hi,

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

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
>
>
>
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