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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SN6PR11MB3504.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: e015a88f-dc65-40a0-f41a-08da2f3c2302 X-MS-Exchange-CrossTenant-originalarrivaltime: 06 May 2022 08:40:55.7660 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: EuIkdg2buY4wwePB0uECovEZk7vz1Ys5qOGjQ4aH2HQuAFEI9i5FdcfoysvvDcKjrzxnX5dbTjUh9HYCbqJoIA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR11MB3058 X-OriginatorOrg: intel.com X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org > -----Original Message----- > From: Ding, Xuan > Sent: Friday, April 15, 2022 10:08 AM > To: maxime.coquelin@redhat.com; Xia, Chenbo > Cc: dev@dpdk.org; Hu, Jiayu ; Ding, Xuan > ; stable@dpdk.org > Subject: [PATCH v3] doc: fix vhost multi-queue reconnection >=20 > From: Xuan Ding >=20 > 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. >=20 > Fixes: b37e95507e1b ("doc: add vhost multi-queue reconnection issue") > Cc: stable@dpdk.org >=20 > Signed-off-by: Xuan Ding > --- > v3: > * Updated affected QEMU versions. >=20 > v2: > * Add fixes in commit title and log. > --- > doc/guides/rel_notes/known_issues.rst | 7 ++++--- > 1 file changed, 4 insertions(+), 3 deletions(-) >=20 > diff --git a/doc/guides/rel_notes/known_issues.rst > b/doc/guides/rel_notes/known_issues.rst > index 187d9c942e..bd89d58d24 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. >=20 > -Vhost multi-queue reconnection failed with QEMU version >=3D 4.2.0 > ----------------------------------------------------------------- > +Vhost multi-queue reconnection failed with QEMU version 4.2.0 to 5.1.0- > rc3 So 5.1.0 fixes the problem or not? As 5.1.0 is later than 5.1.0-rc3 but you= said from 5.2.0 it's fixed. And I think we should just mention formal release, n= ot any rc, qemu users should not use any rc for formal usage. Thanks, Chenbo > +------------------------------------------------------------------------= - > - >=20 > **Description** > It's a QEMU regression bug (bad commit: c6beefd674ff). QEMU only save= s > 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"). >=20 > **Implication** > Vhost cannot reconnect back to virtio-net/virtio-pmd normally. > -- > 2.17.1