Re: Xen-unstable Linux 3.14-rc3 and 3.13 Network troubles

[annie li <annie.li@oracle.com>]

On 2014/2/19 5:25, Sander Eikelenboom wrote:
> Hi All,
>
> I'm currently having some network troubles with Xen and recent linux kernels.
>
> - When running with a 3.14-rc3 kernel in dom0 and a 3.13 kernel in domU
>    I get what seems to be described in this thread: http://www.spinics.net/lists/netdev/msg242953.html
>
>    In the guest:
>    [57539.859584] net eth0: rx->offset: 0, size: 4294967295
>    [57539.859599] net eth0: rx->offset: 0, size: 4294967295
>    [57539.859605] net eth0: rx->offset: 0, size: 4294967295
>    [57539.859610] net eth0: Need more slots
>    [58157.675939] net eth0: Need more slots
>    [58725.344712] net eth0: Need more slots
>    [61815.849180] net eth0: rx->offset: 0, size: 4294967295
>    [61815.849205] net eth0: rx->offset: 0, size: 4294967295
>    [61815.849216] net eth0: rx->offset: 0, size: 4294967295
>    [61815.849225] net eth0: Need more slots

This issue is familiar... and I thought it get fixed.
 From original analysis for similar issue I hit before, the root cause 
is netback still creates response when the ring is full. I remember 
larger MTU can trigger this issue before, what is the MTU size?

Thanks
Annie
>
>    Xen reports:
>    (XEN) [2014-02-18 03:22:47] grant_table.c:1857:d0 Bad grant reference 19791875
>    (XEN) [2014-02-18 03:42:33] grant_table.c:1857:d0 Bad grant reference 268435460
>    (XEN) [2014-02-18 04:15:23] grant_table.c:289:d0 Increased maptrack size to 14 frames
>    (XEN) [2014-02-18 04:15:27] grant_table.c:289:d0 Increased maptrack size to 15 frames
>    (XEN) [2014-02-18 04:15:48] grant_table.c:289:d0 Increased maptrack size to 16 frames
>    (XEN) [2014-02-18 04:15:50] grant_table.c:289:d0 Increased maptrack size to 17 frames
>    (XEN) [2014-02-18 04:15:55] grant_table.c:289:d0 Increased maptrack size to 18 frames
>    (XEN) [2014-02-18 04:15:55] grant_table.c:289:d0 Increased maptrack size to 19 frames
>    (XEN) [2014-02-18 04:15:56] grant_table.c:289:d0 Increased maptrack size to 20 frames
>    (XEN) [2014-02-18 04:15:56] grant_table.c:289:d0 Increased maptrack size to 21 frames
>    (XEN) [2014-02-18 04:15:59] grant_table.c:289:d0 Increased maptrack size to 22 frames
>    (XEN) [2014-02-18 04:15:59] grant_table.c:289:d0 Increased maptrack size to 23 frames
>    (XEN) [2014-02-18 04:16:00] grant_table.c:289:d0 Increased maptrack size to 24 frames
>    (XEN) [2014-02-18 04:16:05] grant_table.c:289:d0 Increased maptrack size to 25 frames
>    (XEN) [2014-02-18 04:16:05] grant_table.c:289:d0 Increased maptrack size to 26 frames
>    (XEN) [2014-02-18 04:16:06] grant_table.c:289:d0 Increased maptrack size to 27 frames
>    (XEN) [2014-02-18 04:16:12] grant_table.c:289:d0 Increased maptrack size to 28 frames
>    (XEN) [2014-02-18 04:16:18] grant_table.c:289:d0 Increased maptrack size to 29 frames
>    (XEN) [2014-02-18 04:17:00] grant_table.c:1857:d0 Bad grant reference 268435460
>    (XEN) [2014-02-18 04:17:00] grant_table.c:1857:d0 Bad grant reference 268435460
>    (XEN) [2014-02-18 04:34:03] grant_table.c:1857:d0 Bad grant reference 4325377
>
>
>
> Another issue with networking is when running both dom0 and domU's with a 3.14-rc3 kernel:
>    - i can ping the guests from dom0
>    - i can ping dom0 from the guests
>    - But i can't ssh or access things by http
>    - I don't see any relevant error messages ...
>    - This is with the same system and kernel config as with the 3.14 and 3.13 combination above
>      (that previously worked fine)
>
> --
>
> Sander
>
>
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