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

["Dennis Lan (dlan)" <dennis.yxun@xxxxxxxxx>]

Hello zoli:
 should we back port this to longterm maintain kernel? current the
most recent version is 3.14.17

Lan

On Wed, Jun 11, 2014 at 2:42 AM, Zoltan Kiss <zoltan.kiss@xxxxxxxxxx> wrote:
> 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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>> http://lists.xen.org/xen-devel
>>
>
>
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