From: Jiayu Hu <jiayu.hu@intel.com>
To: dev@dpdk.org
Cc: maxime.coquelin@redhat.com, chenbo.xia@intel.com,
yinan.wang@intel.com, cheng1.jiang@intel.com,
sunil.pai.g@intel.com, Jiayu Hu <jiayu.hu@intel.com>
Subject: [dpdk-dev] [PATCH 3/4] vhost: avoid deadlock on async register
Date: Wed, 17 Mar 2021 08:56:12 -0400 [thread overview]
Message-ID: <1615985773-406787-4-git-send-email-jiayu.hu@intel.com> (raw)
In-Reply-To: <1615985773-406787-1-git-send-email-jiayu.hu@intel.com>
Users register async copy device when vhost queue is enabled.
However, if VHOST_USER_F_PROTOCOL_FEATURES is not supported,
a deadlock occurs inside rte_vhost_async_channel_register(),
as vhost_user_msg_handler() already takes vq->access_lock
before processing VHOST_USER_SET_VRING_KICK message.
This patch removes calling vring_state_changed() in
vhost_user_set_vring_kick() to avoid deadlock on async register.
Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
---
lib/librte_vhost/vhost_user.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 399675c..a319c1c 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1919,9 +1919,6 @@ vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg,
*/
if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
vq->enabled = 1;
- if (dev->notify_ops->vring_state_changed)
- dev->notify_ops->vring_state_changed(
- dev->vid, file.index, 1);
}
if (vq->ready) {
--
2.7.4
next prev parent reply other threads:[~2021-03-17 6:26 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-17 12:56 [dpdk-dev] [PATCH 0/4] Refactor async vhost control path Jiayu Hu
2021-03-17 12:56 ` [dpdk-dev] [PATCH 1/4] vhost: fix uninitialized vhost queue Jiayu Hu
2021-03-26 15:14 ` Maxime Coquelin
2021-03-17 12:56 ` [dpdk-dev] [PATCH 2/4] vhost: remove unnecessary free Jiayu Hu
2021-03-29 15:03 ` Maxime Coquelin
2021-03-17 12:56 ` Jiayu Hu [this message]
2021-03-29 15:19 ` [dpdk-dev] [PATCH 3/4] vhost: avoid deadlock on async register Maxime Coquelin
2021-03-30 1:20 ` Hu, Jiayu
2021-04-13 9:37 ` Maxime Coquelin
2021-03-17 12:56 ` [dpdk-dev] [PATCH 4/4] doc: update async vhost register/unregister Jiayu Hu
2021-04-02 13:03 ` [dpdk-dev] [PATCH v2 0/4] Refactor async vhost control path Jiayu Hu
2021-04-02 8:06 ` Wang, Yinan
2021-04-02 13:03 ` [dpdk-dev] [PATCH v2 1/4] vhost: fix uninitialized vhost queue Jiayu Hu
2021-04-13 11:30 ` Maxime Coquelin
2021-04-02 13:04 ` [dpdk-dev] [PATCH v2 2/4] vhost: remove unnecessary free Jiayu Hu
2021-04-02 13:04 ` [dpdk-dev] [PATCH v2 3/4] vhost: avoid deadlock on async register Jiayu Hu
2021-04-13 11:33 ` Maxime Coquelin
2021-04-14 1:40 ` Hu, Jiayu
2021-04-14 10:08 ` Maxime Coquelin
2021-04-15 1:08 ` Hu, Jiayu
2021-04-15 7:09 ` Maxime Coquelin
2021-04-16 2:19 ` Hu, Jiayu
2021-04-16 6:35 ` Maxime Coquelin
2021-04-16 8:18 ` Hu, Jiayu
2021-04-16 8:33 ` Maxime Coquelin
2021-04-19 4:10 ` Hu, Jiayu
2021-04-19 7:13 ` Maxime Coquelin
2021-04-19 9:02 ` Hu, Jiayu
2021-04-02 13:04 ` [dpdk-dev] [PATCH v2 4/4] doc: update async vhost register/unregister Jiayu Hu
2021-04-20 8:57 ` [dpdk-dev] [PATCH v3 0/4] Refactor async vhost control path Jiayu Hu
2021-04-20 8:57 ` [dpdk-dev] [PATCH v3 1/4] vhost: fix uninitialized vhost queue Jiayu Hu
2021-04-20 8:57 ` [dpdk-dev] [PATCH v3 2/4] vhost: remove unnecessary free Jiayu Hu
2021-04-20 8:57 ` [dpdk-dev] [PATCH v3 3/4] vhost: fix unnecessary vring_state_changed call Jiayu Hu
2021-04-20 9:39 ` Maxime Coquelin
2021-04-21 1:36 ` Xia, Chenbo
2021-04-20 8:57 ` [dpdk-dev] [PATCH v3 4/4] doc: update async vhost register/unregister Jiayu Hu
2021-04-20 9:31 ` Maxime Coquelin
2021-04-28 2:05 ` [dpdk-dev] [PATCH v3 0/4] Refactor async vhost control path Xia, Chenbo
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