Userspace datapath uses per-PMD flow tables/classifiers for a long
time. However, it was decided to keep this race window to not block
revalidators. Comment should be updated to reflect the current state.
Fixes: 1c1e46ed8457 ("dpif-netdev: Add per-pmd flow-table/classifier.")
Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
Reviewed-by: Greg Rose <gvrose8192@gmail.com>
Signed-off-by: Ian Stokes <ian.stokes@intel.com>
* could have already been installed since we last did the flow
* lookup before upcall. This could be solved by moving the
* mutex lock outside the loop, but that's an awful long time
- * to be locking everyone out of making flow installs. If we
- * move to a per-core classifier, it would be reasonable. */
+ * to be locking revalidators out of making flow modifications. */
ovs_mutex_lock(&pmd->flow_mutex);
netdev_flow = dp_netdev_pmd_lookup_flow(pmd, key, NULL);
if (OVS_LIKELY(!netdev_flow)) {