From: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
Date: Mon, 4 May 2020 09:30:59 +0000 (+0200)
Subject: event/dsw: avoid reusing previously recorded events
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=52b66b2f208aea74e5fc3b004c1e14056bb22970;p=dpdk.git

event/dsw: avoid reusing previously recorded events

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@dpdk.org

Reported-by: Venky Venkatesh <vvenkatesh@paloaltonetworks.com>
Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
---

diff --git a/drivers/event/dsw/dsw_event.c b/drivers/event/dsw/dsw_event.c
index 8323903736..e5e3597aae 100644
--- a/drivers/event/dsw/dsw_event.c
+++ b/drivers/event/dsw/dsw_event.c
@@ -821,6 +821,9 @@ dsw_port_consider_emigration(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 emigration.\n");
 
 	/* Randomize interval to avoid having all threads considering