[ovs-dev] [PATCH V3 2/2] dpif-netdev: Purge all ukeys when reconfigure pmd.

Joe Stringer joestringer at nicira.com
Sat Aug 29 18:37:30 UTC 2015

On 29 August 2015 at 00:42, Alex Wang <ee07b291 at gmail.com> wrote:
> When dpdk configuration changes, all pmd threads are recreated
> and rx queues of each port are reloaded.  After this process,
> rx queue could be mapped to a different pmd thread other than
> the one before reconfiguration.  However, this is totally
> transparent to ofproto layer modules.  So, if the ofproto-dpif-upcall
> module still holds ukeys generated before pmd thread recreation,
> this old ukey will collide with the ukey for the new upcalls
> from same traffic flow, causing flow installation failure.
> To fix the bug, this commit adds a new call-back function
> in dpif layer for notifying upper layer the purging of datapath
> (e.g. pmd thread deletion in dpif-netdev).  So, the
> ofproto-dpif-upcall module can react properly with deleting
> the ukeys and with collecting flows' last stats.
> Reported-by: Ilya Maximets <i.maximets at samsung.com>
> Signed-off-by: Alex Wang <ee07b291 at gmail.com>
> Acked-by: Daniele Di Proietto <diproiettod at vmware.com>
> Tested-by: Daniele Di Proietto <diproiettod at vmware.com>

This looks good to me, so long as we can iron out the issues in patch 1.

Acked-by: Joe Stringer <joestringer at nicira.com>

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