From ed06ea24dc419a55fd5e9a1601f1144434360eda Mon Sep 17 00:00:00 2001
From: Maxime Coquelin <maxime.coquelin@redhat.com>
Date: Fri, 15 Jun 2018 15:48:46 +0200
Subject: [PATCH] vhost: fix missing increment of log cache count

The log_cache_nb_elem was never incremented, resulting
in all dirty pages to be missed during live migration.

Fixes: c16915b87109 ("vhost: improve dirty pages logging performance")
Cc: stable@dpdk.org

Reported-by: Peng He <xnhp0320@icloud.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Acked-by: Ilya Maximets <i.maximets@samsung.com>
Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>
(cherry picked from commit 511b413bbcbd711dcf582485a72213fa90595cbe)
---
 lib/librte_vhost/vhost.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index e0ab65e0c..429b974db 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -387,6 +387,7 @@ vhost_log_cache_page(struct virtio_net *dev, struct vhost_virtqueue *vq,
 
 	vq->log_cache[i].offset = offset;
 	vq->log_cache[i].val = (1UL << bit_nr);
+	vq->log_cache_nb_elem++;
 }
 
 static __rte_always_inline void
-- 
2.17.1