* [PATCH] vhost-net: initialize zcopy packet counters
@ 2012-12-03 17:31 Michael S. Tsirkin
2012-12-03 18:42 ` David Miller
0 siblings, 1 reply; 2+ messages in thread
From: Michael S. Tsirkin @ 2012-12-03 17:31 UTC (permalink / raw)
To: davem; +Cc: netdev, virtualization, linux-kernel, kvm, Michael S. Tsirkin
These packet counters are used to drive the zercopy
selection heuristic so nothing too bad happens if they are off a bit -
and they are also reset once in a while.
But it's cleaner to clear them when backend is set so that
we start in a known state.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
drivers/vhost/net.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 67898fa..ff6c9199 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -823,6 +823,9 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
r = vhost_init_used(vq);
if (r)
goto err_vq;
+
+ n->tx_packets = 0;
+ n->tx_zcopy_err = 0;
}
mutex_unlock(&vq->mutex);
--
MST
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2012-12-03 18:42 ` David Miller
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