On Wed, 24 Feb 2016 17:14:43 +0300
Ilya Maximets <i.maxim...@samsung.com> wrote:
> Currently virtio driver in guest operating system have to be configured
> to use exactly same number of queues. If number of queues will be less,
> some packets will get stuck in queues unused by guest and will not be
> received.
>
> Fix that by using new 'vring_state_changed' callback, which is
> available for vhost-user since DPDK 2.2.
> Implementation uses additional mapping from configured tx queues to
> enabled by virtio driver. This requires mandatory locking of TX queues
> in __netdev_dpdk_vhost_send(), but this locking was almost always anyway
> because of calling set_multiq with n_txq = 'ovs_numa_get_n_cores() + 1'.
>
> OVS_VHOST_MAX_QUEUE_NUM = 1024 chosen based on the fact that this is
> the maximum number of queues supported by QEMU.
>
> Fixes: 4573fbd38fa1 ("netdev-dpdk: Add vhost-user multiqueue support")
> Signed-off-by: Ilya Maximets <i.maxim...@samsung.com>
> ---
>
> version 4:
> * VHOST_MAX_QUEUE_PAIRS replaced with OVS_VHOST_MAX_QUEUE_NUM
>
> version 3:
> * Fixed size in dpdk_rte_mzalloc() for enabled_queues.
> * Fixed possible segfault because of unallocated tx_q[].
> * Added remap of tx queues after real_n_txq modification
> in netdev_dpdk_vhost_set_queues().
>
> lib/netdev-dpdk.c | 114
> +++++++++++++++++++++++++++++++++++++++++++++++-------
> 1 file changed, 99 insertions(+), 15 deletions(-)
>
Acked-by: Flavio Leitner <f...@sysclose.org>
It would be great if this gets applied to branch-2.5 as well.
Thanks Ilya!
--
fbl
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