[ovs-dev] [PATCH v4 2/3] vhost: Disable multi-segmented buffers

Flavio Leitner fbl at sysclose.org
Thu Jan 16 17:00:34 UTC 2020


There is no support for multi-segmented buffers, so flag
that to vhost library.

Signed-off-by: Flavio Leitner <fbl at sysclose.org>
---
 lib/netdev-dpdk.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
index 72b67af1a..d1469f6f2 100644
--- a/lib/netdev-dpdk.c
+++ b/lib/netdev-dpdk.c
@@ -1347,6 +1347,9 @@ netdev_dpdk_vhost_construct(struct netdev *netdev)
     dev->vhost_id = xasprintf("%s/%s", dpdk_get_vhost_sock_dir(), name);
 
     dev->vhost_driver_flags &= ~RTE_VHOST_USER_CLIENT;
+
+    /* There is no support for multi-segments buffers. */
+    dev->vhost_driver_flags |= RTE_VHOST_USER_LINEARBUF_SUPPORT;
     err = rte_vhost_driver_register(dev->vhost_id, dev->vhost_driver_flags);
     if (err) {
         VLOG_ERR("vhost-user socket device setup failure for socket %s\n",
@@ -4952,6 +4955,9 @@ netdev_dpdk_vhost_client_reconfigure(struct netdev *netdev)
         /* Register client-mode device. */
         vhost_flags |= RTE_VHOST_USER_CLIENT;
 
+        /* There is no support for multi-segments buffers. */
+        vhost_flags |= RTE_VHOST_USER_LINEARBUF_SUPPORT;
+
         /* Enable IOMMU support, if explicitly requested. */
         if (dpdk_vhost_iommu_enabled()) {
             vhost_flags |= RTE_VHOST_USER_IOMMU_SUPPORT;
-- 
2.24.1



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