From: Jiayu Hu <jiayu.hu@intel.com>
To: dev@dpdk.org
Cc: maxime.coquelin@redhat.com, chenbo.xia@intel.com,
yinan.wang@intel.com, sunil.pai.g@intel.com,
cheng1.jiang@intel.com, jiayu.hu@intel.com
Subject: [dpdk-dev] [PATCH v3 4/4] doc: update async vhost register/unregister
Date: Tue, 20 Apr 2021 04:57:46 -0400 [thread overview]
Message-ID: <1618909066-114980-5-git-send-email-jiayu.hu@intel.com> (raw)
In-Reply-To: <1618909066-114980-1-git-send-email-jiayu.hu@intel.com>
This patch is to update programmer guide for register/unregister
copy devices in vhost.
Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
---
doc/guides/prog_guide/vhost_lib.rst | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/doc/guides/prog_guide/vhost_lib.rst b/doc/guides/prog_guide/vhost_lib.rst
index dc29229..7afa351 100644
--- a/doc/guides/prog_guide/vhost_lib.rst
+++ b/doc/guides/prog_guide/vhost_lib.rst
@@ -208,9 +208,9 @@ The following is an overview of some key Vhost API functions:
* ``rte_vhost_async_channel_register(vid, queue_id, features, ops)``
- Register a vhost queue with async copy device channel.
- Following device ``features`` must be specified together with the
- registration:
+ Register a vhost queue with async copy device channel after vring
+ is enabled. Following device ``features`` must be specified together
+ with the registration:
* ``async_inorder``
@@ -244,6 +244,14 @@ The following is an overview of some key Vhost API functions:
* ``rte_vhost_async_channel_unregister(vid, queue_id)``
Unregister the async copy device channel from a vhost queue.
+ Unregistration will fail, if the vhost queue has in-flight
+ packets that are not completed.
+
+ Unregister async copy devices in vring_state_changed() may
+ fail, as this API tries to acquire the spinlock of vhost
+ queue. The recommended way is to unregister async copy
+ devices for all vhost queues in destroy_device(), when a
+ virtio device is paused or shut down.
* ``rte_vhost_submit_enqueue_burst(vid, queue_id, pkts, count, comp_pkts, comp_count)``
--
2.7.4
next prev parent reply other threads:[~2021-04-20 2:29 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 ` [dpdk-dev] [PATCH 3/4] vhost: avoid deadlock on async register Jiayu Hu
2021-03-29 15:19 ` 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 ` Jiayu Hu [this message]
2021-04-20 9:31 ` [dpdk-dev] [PATCH v3 4/4] doc: update async vhost register/unregister Maxime Coquelin
2021-04-28 2:05 ` [dpdk-dev] [PATCH v3 0/4] Refactor async vhost control path Xia, Chenbo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1618909066-114980-5-git-send-email-jiayu.hu@intel.com \
--to=jiayu.hu@intel.com \
--cc=chenbo.xia@intel.com \
--cc=cheng1.jiang@intel.com \
--cc=dev@dpdk.org \
--cc=maxime.coquelin@redhat.com \
--cc=sunil.pai.g@intel.com \
--cc=yinan.wang@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).