Tested-by:zhang,xi <[email protected]>
-----Original Message-----
From: Yigit, Ferruh
Sent: Thursday, May 21, 2020 11:11 PM
To: Rasesh Mody <[email protected]>
Cc: [email protected]; Yigit, Ferruh <[email protected]>; [email protected];
Zhang, XiX <[email protected]>
Subject: [PATCH] examples/kni: fix crash during MTU set
During MTU set (kni_change_mtu) sample application setup queues, which can free
and re-allocate queues.
Meanwhile sample application keeps continues in Rx/Tx burst calls in different
threads, which may cause crash during queue setup.
Pausing application Rx/Tx calls before MTU set and starts it back afterwards.
Bugzilla ID: 482
Fixes: a26b116749a3 ("examples/kni: fix MTU change to setup Tx queue")
Cc: [email protected]
Signed-off-by: Ferruh Yigit <[email protected]>
---
Cc: Rasesh Mody <[email protected]>
Cc: Xi Zhang <[email protected]>
---
examples/kni/main.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/examples/kni/main.c b/examples/kni/main.c index
7a927a50c0..80dd0353e7 100644
--- a/examples/kni/main.c
+++ b/examples/kni/main.c
@@ -768,9 +768,8 @@ monitor_all_ports_link_status(void *arg)
return NULL;
}
-/* Callback for request of changing MTU */ static int
-kni_change_mtu(uint16_t port_id, unsigned int new_mtu)
+kni_change_mtu_(uint16_t port_id, unsigned int new_mtu)
{
int ret;
uint16_t nb_rxd = NB_RXD;
@@ -851,6 +850,19 @@ kni_change_mtu(uint16_t port_id, unsigned int new_mtu)
return 0;
}
+/* Callback for request of changing MTU */ static int
+kni_change_mtu(uint16_t port_id, unsigned int new_mtu) {
+ int ret;
+
+ rte_atomic32_inc(&kni_pause);
+ ret = kni_change_mtu_(port_id, new_mtu);
+ rte_atomic32_dec(&kni_pause);
+
+ return ret;
+}
+
/* Callback for request of configuring network interface up/down */ static
int kni_config_network_interface(uint16_t port_id, uint8_t if_up)
--
2.25.4
