From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: xiangxia.m.yue@gmail.com, jianfeng.tan@intel.com, yliu@fridaylinux.org
Cc: dev@dpdk.org, stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH 1/3] vhost: fix deadlock due to vhostuser socket and fdset
Date: Fri, 4 May 2018 17:11:29 +0200 [thread overview]
Message-ID: <acaaff29-8f1a-9885-f305-7e175bb89d83@redhat.com> (raw)
In-Reply-To: <1524842385-61707-1-git-send-email-xiangxia.m.yue@gmail.com>
On 04/27/2018 05:19 PM, xiangxia.m.yue@gmail.com wrote:
> From: Tonghao Zhang <xiangxia.m.yue@gmail.com>
>
> When qemu close the unix socket fd of the vhostuser as a
> server, and then immediately delete the vhostuser port on
> openvswitch. There will be a deadlock.
>
> A thread (fdset event thread): B thread:
> 1. fdset_event_dispatch rte_vhost_driver_unregister
> 2. set the fd busy to 1. lock vsocket->conn_mutex
> 3. vhost_user_read_cb fdset_del waits busy changed to 0.
> 4. vhost peer closed, remove the
> conn from vsocket->conn_list:
> lock vsocket->conn_mutex
>
> 5. set the fd busy to 0
>
> Fixes: 65388b43 ("vhost: fix fd leaks for vhost-user server mode")
> Cc: stable@dpdk.org
> Cc: Yuanhan Liu <yliu@fridaylinux.org>
> Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
> ---
> lib/librte_vhost/fd_man.c | 32 ++++++++++++++++++++++++++++++++
> lib/librte_vhost/fd_man.h | 1 +
> lib/librte_vhost/socket.c | 13 ++++++++++++-
> 3 files changed, 45 insertions(+), 1 deletion(-)
>
Applied to dpdk-next-virtio/master.
Please next time add a cover-letter and run check-git-log.sh and
checkpatch.sh scripts before submitting.
Thanks!
Maxime
prev parent reply other threads:[~2018-05-04 15:11 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-27 15:19 xiangxia.m.yue
2018-04-27 15:19 ` [dpdk-dev] [PATCH 2/3] vhost: fix crash and fd leak due to vhostuser destroyed xiangxia.m.yue
2018-05-04 13:02 ` Maxime Coquelin
2018-05-04 15:11 ` Maxime Coquelin
2018-04-27 15:19 ` [dpdk-dev] [PATCH 3/3] vhost: fix typo in fdset_event_dispatch comment xiangxia.m.yue
2018-05-04 13:03 ` Maxime Coquelin
2018-05-04 15:11 ` Maxime Coquelin
2018-05-04 13:00 ` [dpdk-dev] [PATCH 1/3] vhost: fix deadlock due to vhostuser socket and fdset Maxime Coquelin
2018-05-04 15:11 ` Maxime Coquelin [this message]
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