[dpdk-stable] [PATCH] event/dsw: avoid reusing previously recorded events

[Mattias Rönnblom]

Avoid reusing recorded events when performing a migration, since this
may make the migration selection logic pick an already-moved flow.

Fixes: f6257b22e767 ("event/dsw: add load balancing")
Cc: stable at dpdk.org

Reported-by: Venky Venkatesh <vvenkatesh at paloaltonetworks.com>
Signed-off-by: Mattias Rönnblom <mattias.ronnblom at ericsson.com>
---
 drivers/event/dsw/dsw_event.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/event/dsw/dsw_event.c b/drivers/event/dsw/dsw_event.c
index d68b71b98..296adea18 100644
--- a/drivers/event/dsw/dsw_event.c
+++ b/drivers/event/dsw/dsw_event.c
@@ -646,6 +646,9 @@ dsw_port_consider_migration(struct dsw_evdev *dsw,
 	if (dsw->num_ports == 1)
 		return;
 
+	if (seen_events_len < DSW_MAX_EVENTS_RECORDED)
+		return;
+
 	DSW_LOG_DP_PORT(DEBUG, source_port->id, "Considering migration.\n");
 
 	/* Randomize interval to avoid having all threads considering
-- 
2.17.1