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dpif-netdev: Update comment about flow installation race.

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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: 1c1e46ed84 ("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>
This commit is contained in:
Ilya Maximets
2019-04-17 11:43:56 +03:00
committed by Ian Stokes
parent b137383e86
commit af741ca346
1 changed files with 1 additions and 2 deletions
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3
lib/dpif-netdev.c
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@@ -6549,8 +6549,7 @@ handle_packet_upcall(struct dp_netdev_pmd_thread *pmd,
* 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)) {