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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: bca23448-86f1-47aa-9187-08da3739c55c X-MS-Exchange-CrossTenant-originalarrivaltime: 16 May 2022 12:44:08.9875 (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: Jd76DW6EAtC2bL6t5HjjIXs23TuKNmrNjf43HLl5La5Y0LLSP3kFPngjr70/XP/CIFnddLBXVighHyV6f8jsFQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR11MB2953 X-OriginatorOrg: intel.com X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org > -----Original Message----- > From: Ding, Xuan > Sent: Monday, May 9, 2022 12:12 PM > To: maxime.coquelin@redhat.com; Xia, Chenbo > Cc: dev@dpdk.org; Hu, Jiayu ; Ding, Xuan > ; stable@dpdk.org > Subject: [PATCH v4] 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 > --- > v4: > * Corrected the QEMU fix version. >=20 > v3: > * Updated affected QEMU versions. >=20 > v2: > * Added 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..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. >=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 > +---------------------------------------------------------------------- >=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 Reviewed-by: Chenbo Xia