diff mbox series

[v4] doc: fix vhost multi-queue reconnection

Message ID 20220509041158.61185-1-xuan.ding@intel.com (mailing list archive)
State Accepted, archived
Delegated to: Maxime Coquelin
Headers
Series [v4] doc: fix vhost multi-queue reconnection |

Checks

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ci/iol-intel-Performance success Performance Testing PASS
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ci/intel-Testing success Testing PASS
ci/iol-aarch64-unit-testing success Testing PASS
ci/iol-aarch64-compile-testing success Testing PASS
ci/iol-x86_64-unit-testing success Testing PASS
ci/iol-abi-testing success Testing PASS
ci/iol-x86_64-compile-testing success Testing PASS

Commit Message

Ding, Xuan May 9, 2022, 4:11 a.m. UTC 
  From: Xuan Ding <xuan.ding@intel.com>

Since QEMU 5.2.0 fixes the vhost split ring multi-queue reconnection
issue in commit f66337bdbfda ("vhost-user: save features of multiqueues
if chardev is closed"), this patch updates known issue to indicate
the range of affeacted QEMU versions.

Fixes: b37e95507e1b ("doc: add vhost multi-queue reconnection issue")
Cc: stable@dpdk.org

Signed-off-by: Xuan Ding <xuan.ding@intel.com>
---
v4:
* Corrected the QEMU fix version.

v3:
* Updated affected QEMU versions.

v2:
* Added fixes in commit title and log.
---
 doc/guides/rel_notes/known_issues.rst | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

Comments

Chenbo Xia May 16, 2022, 12:44 p.m. UTC | #1 
> -----Original Message-----
> From: Ding, Xuan <xuan.ding@intel.com>
> Sent: Monday, May 9, 2022 12:12 PM
> To: maxime.coquelin@redhat.com; Xia, Chenbo <chenbo.xia@intel.com>
> Cc: dev@dpdk.org; Hu, Jiayu <jiayu.hu@intel.com>; Ding, Xuan
> <xuan.ding@intel.com>; stable@dpdk.org
> Subject: [PATCH v4] doc: fix vhost multi-queue reconnection
> 
> From: Xuan Ding <xuan.ding@intel.com>
> 
> Since QEMU 5.2.0 fixes the vhost split ring multi-queue reconnection
> issue in commit f66337bdbfda ("vhost-user: save features of multiqueues
> if chardev is closed"), this patch updates known issue to indicate
> the range of affeacted QEMU versions.
> 
> Fixes: b37e95507e1b ("doc: add vhost multi-queue reconnection issue")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Xuan Ding <xuan.ding@intel.com>
> ---
> v4:
> * Corrected the QEMU fix version.
> 
> v3:
> * Updated affected QEMU versions.
> 
> v2:
> * Added fixes in commit title and log.
> ---
>  doc/guides/rel_notes/known_issues.rst | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/doc/guides/rel_notes/known_issues.rst
> b/doc/guides/rel_notes/known_issues.rst
> index 187d9c942e..570550843a 100644
> --- a/doc/guides/rel_notes/known_issues.rst
> +++ b/doc/guides/rel_notes/known_issues.rst
> @@ -885,14 +885,15 @@ Unsuitable IOVA mode may be picked as the default
>  **Driver/Module**:
>     ALL.
> 
> -Vhost multi-queue reconnection failed with QEMU version >= 4.2.0
> -----------------------------------------------------------------
> +Vhost multi-queue reconnection failed with QEMU version 4.2.0 to 5.1.0
> +----------------------------------------------------------------------
> 
>  **Description**
>     It's a QEMU regression bug (bad commit: c6beefd674ff). QEMU only saves
>     acked features for one vhost-net when vhost quits. When vhost
> reconnects
>     to virtio-net/virtio-pmd in multi-queue situations, the features been
> -   set multiple times are not consistent.
> +   set multiple times are not consistent. QEMU-5.2.0 fixes this issue in
> commit
> +   f66337bdbfda ("vhost-user: save features of multiqueues if chardev is
> closed").
> 
>  **Implication**
>     Vhost cannot reconnect back to virtio-net/virtio-pmd normally.
> --
> 2.17.1

Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
diff mbox series

Patch

diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst
index 187d9c942e..570550843a 100644
--- a/doc/guides/rel_notes/known_issues.rst
+++ b/doc/guides/rel_notes/known_issues.rst
@@ -885,14 +885,15 @@  Unsuitable IOVA mode may be picked as the default
 **Driver/Module**:
    ALL.
 
-Vhost multi-queue reconnection failed with QEMU version >= 4.2.0
-----------------------------------------------------------------
+Vhost multi-queue reconnection failed with QEMU version 4.2.0 to 5.1.0
+----------------------------------------------------------------------
 
 **Description**
    It's a QEMU regression bug (bad commit: c6beefd674ff). QEMU only saves
    acked features for one vhost-net when vhost quits. When vhost reconnects
    to virtio-net/virtio-pmd in multi-queue situations, the features been
-   set multiple times are not consistent.
+   set multiple times are not consistent. QEMU-5.2.0 fixes this issue in commit
+   f66337bdbfda ("vhost-user: save features of multiqueues if chardev is closed").
 
 **Implication**
    Vhost cannot reconnect back to virtio-net/virtio-pmd normally.