netdev - [PATCH 1/2] vhost: remove the possible fruitless search on iotlb prefetch

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Date:   Sat, 19 Aug 2017 15:41:14 +0900
From:   Koichiro Den <den@...ipeden.com>
To:     mst@...hat.com, jasowang@...hat.com
Cc:     kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        netdev@...r.kernel.org
Subject: [PATCH 1/2] vhost: remove the possible fruitless search on iotlb prefetch

Signed-off-by: Koichiro Den <den@...ipeden.com>
---
 drivers/vhost/vhost.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index e4613a3c362d..93e909afc1c3 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -1184,7 +1184,7 @@ static int iotlb_access_ok(struct vhost_virtqueue *vq,
 	while (len > s) {
 		node = vhost_umem_interval_tree_iter_first(&umem->umem_tree,
 							   addr,
-							   addr + len - 1);
+							   addr + len - s - 1);
 		if (node == NULL || node->start > addr) {
 			vhost_iotlb_miss(vq, addr, access);
 			return false;
-- 
2.9.4