* stable backport of 3 xen multiqueue network dev fixes
@ 2016-01-21 11:58 Ian Campbell
2016-01-27 1:44 ` David Miller
2016-01-27 1:44 ` David Miller
0 siblings, 2 replies; 4+ messages in thread
From: Ian Campbell @ 2016-01-21 11:58 UTC (permalink / raw)
To: netdev, David Miller; +Cc: xen-devel, Wei Liu, Boris Ostrovsky, David Vrabel
Hi Dave,
Please could you queue these three:
32a8440 xen-netfront: respect user provided max_queues
4c82ac3 xen-netback: respect user provided max_queues
ca88ea1 xen-netfront: update num_queues to real created
for stable backports to at least 4.1. Multiqueue was added in v3.16 so I
think they could all go to LTS that far back.
Users are tripping over issues in the field with exhausting the number of
Xen grant entries available to guests when creating large numbers of queues
(which happens with guests with >=32 VCPUs).
ca88ea1 is a fix which causes the failure to allocate grants for all of the
desired queues gracefully, rather than crashing or failing to pass any
traffic.
32a8440 and 4c82ac3 fix the handling of the module parameters on both ends
so that users can choose to have fewer queues than p/vcpus if they like,
which would have been an effective workaround for the issue solved by
ca88ea1 if that hadn't been broken.
Thanks,
Ian.
^ permalink raw reply [flat|nested] 4+ messages in thread
* stable backport of 3 xen multiqueue network dev fixes
@ 2016-01-21 11:58 Ian Campbell
0 siblings, 0 replies; 4+ messages in thread
From: Ian Campbell @ 2016-01-21 11:58 UTC (permalink / raw)
To: netdev, David Miller; +Cc: Boris Ostrovsky, Wei Liu, David Vrabel, xen-devel
Hi Dave,
Please could you queue these three:
32a8440 xen-netfront: respect user provided max_queues
4c82ac3 xen-netback: respect user provided max_queues
ca88ea1 xen-netfront: update num_queues to real created
for stable backports to at least 4.1. Multiqueue was added in v3.16 so I
think they could all go to LTS that far back.
Users are tripping over issues in the field with exhausting the number of
Xen grant entries available to guests when creating large numbers of queues
(which happens with guests with >=32 VCPUs).
ca88ea1 is a fix which causes the failure to allocate grants for all of the
desired queues gracefully, rather than crashing or failing to pass any
traffic.
32a8440 and 4c82ac3 fix the handling of the module parameters on both ends
so that users can choose to have fewer queues than p/vcpus if they like,
which would have been an effective workaround for the issue solved by
ca88ea1 if that hadn't been broken.
Thanks,
Ian.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: stable backport of 3 xen multiqueue network dev fixes
2016-01-21 11:58 stable backport of 3 xen multiqueue network dev fixes Ian Campbell
2016-01-27 1:44 ` David Miller
@ 2016-01-27 1:44 ` David Miller
1 sibling, 0 replies; 4+ messages in thread
From: David Miller @ 2016-01-27 1:44 UTC (permalink / raw)
To: ian.campbell; +Cc: netdev, xen-devel, wei.liu2, boris.ostrovsky, david.vrabel
From: Ian Campbell <ian.campbell@citrix.com>
Date: Thu, 21 Jan 2016 11:58:10 +0000
> Please could you queue these three:
>
> 32a8440 xen-netfront: respect user provided max_queues
> 4c82ac3 xen-netback: respect user provided max_queues
> ca88ea1 xen-netfront: update num_queues to real created
>
> for stable backports to at least 4.1. Multiqueue was added in v3.16 so I
> think they could all go to LTS that far back.
Done.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: stable backport of 3 xen multiqueue network dev fixes
2016-01-21 11:58 stable backport of 3 xen multiqueue network dev fixes Ian Campbell
@ 2016-01-27 1:44 ` David Miller
2016-01-27 1:44 ` David Miller
1 sibling, 0 replies; 4+ messages in thread
From: David Miller @ 2016-01-27 1:44 UTC (permalink / raw)
To: ian.campbell; +Cc: netdev, boris.ostrovsky, wei.liu2, david.vrabel, xen-devel
From: Ian Campbell <ian.campbell@citrix.com>
Date: Thu, 21 Jan 2016 11:58:10 +0000
> Please could you queue these three:
>
> 32a8440 xen-netfront: respect user provided max_queues
> 4c82ac3 xen-netback: respect user provided max_queues
> ca88ea1 xen-netfront: update num_queues to real created
>
> for stable backports to at least 4.1. Multiqueue was added in v3.16 so I
> think they could all go to LTS that far back.
Done.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2016-01-21 11:58 stable backport of 3 xen multiqueue network dev fixes Ian Campbell
2016-01-27 1:44 ` David Miller
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2016-01-21 11:58 Ian Campbell
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