[ovs-dev] [PATCH v2] netdev-dummy: Limits the number of tx/rx queues.

[nickcooper-zhangtonghao]

When you set the tx/rx queue number to 10000(or lager), ovs-vswitchd takes more time to process
a port with so many rx/tx queues and the ovs_rcu will report the WARN. The 1024 may be appropriate value because the dpdk uses it as default max value. However, 2048 is also ok, just a limiter.

Thanks.
Nick

> On Jan 9, 2017, at 11:52 PM, Aaron Conole <aconole at redhat.com> wrote:
> 
>> This patch avoids the ovs_rcu to report WARN, caused by blocked
>> for a long time, when ovs-vswitchd processes a port with many
>> rx/tx queues. The number of tx/rx queues per port may be appropriate,
>> because the dpdk uses it as an default max value.
>> 
>> Signed-off-by: nickcooper-zhangtonghao <nic at opencloud.tech <mailto:nic at opencloud.tech>>
>> ---
> 
> I don't understand how this change impacts the ovs_rcu warning, unless
> you find an issue creating 1025 tx/rx queues.  Is that what happened?