From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 4775F4617B; Mon, 3 Feb 2025 05:36:59 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 2F34D40287; Mon, 3 Feb 2025 05:36:59 +0100 (CET) Received: from inbox.dpdk.org (inbox.dpdk.org [95.142.172.178]) by mails.dpdk.org (Postfix) with ESMTP id 48DFC40264 for ; Mon, 3 Feb 2025 05:36:57 +0100 (CET) Received: by inbox.dpdk.org (Postfix, from userid 33) id 410A24617C; Mon, 3 Feb 2025 05:36:57 +0100 (CET) From: bugzilla@dpdk.org To: dev@dpdk.org Subject: [DPDK/vhost/virtio Bug 1658] Vhost multi-queue reconnection failed with QEMU version 4.2.0 to 5.1.0 Date: Mon, 03 Feb 2025 04:36:57 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: DPDK X-Bugzilla-Component: vhost/virtio X-Bugzilla-Version: 18.11 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: nandinipersad361@gmail.com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: Normal X-Bugzilla-Assigned-To: dev@dpdk.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter target_milestone Message-ID: Content-Type: multipart/alternative; boundary=17385574170.6305df8e.2172042 Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All MIME-Version: 1.0 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 --17385574170.6305df8e.2172042 Date: Mon, 3 Feb 2025 05:36:57 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All https://bugs.dpdk.org/show_bug.cgi?id=3D1658 Bug ID: 1658 Summary: Vhost multi-queue reconnection failed with QEMU version 4.2.0 to 5.1.0 Product: DPDK Version: 18.11 Hardware: All OS: All Status: UNCONFIRMED Severity: normal Priority: Normal Component: vhost/virtio Assignee: dev@dpdk.org Reporter: nandinipersad361@gmail.com Target Milestone: --- It=E2=80=99s a QEMU regression bug (bad commit: c6beefd674ff). QEMU only sa= ves 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 mult= iple times are not consistent. QEMU-5.2.0 fixes this issue in commit f66337bdbfda (=E2=80=9Cvhost-user: save features of multiqueues if chardev is closed=E2= =80=9D). Implication Vhost cannot reconnect back to virtio-net/virtio-pmd normally. Resolution/Workaround: It is possible to filter the incorrect acked features at vhost-user side. Affected Environment/Platform: ALL. Driver/Module: Virtual Device Poll Mode Driver (PMD). --=20 You are receiving this mail because: You are the assignee for the bug.= --17385574170.6305df8e.2172042 Date: Mon, 3 Feb 2025 05:36:57 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All

Bug ID	1658
Summary	Vhost multi-queue reconnection failed with QEMU version 4.2.0= to 5.1.0
Product	DPDK
Version	18.11
Hardware	All
OS	All
Status	UNCONFIRMED
Severity	normal
Priority	Normal
Component	vhost/virtio
Assignee	dev@dpdk.org
Reporter	nandinipersad361@gmail.com
Target Milestone	---

It=E2=80=99s 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 mult=
iple
times are not consistent. QEMU-5.2.0 fixes this issue in commit f66337bdbfda
(=E2=80=9Cvhost-user: save features of multiqueues if chardev is closed=E2=
=80=9D).

Implication
Vhost cannot reconnect back to virtio-net/virtio-pmd normally.

Resolution/Workaround:
It is possible to filter the incorrect acked features at vhost-user side.

Affected Environment/Platform:
ALL.

Driver/Module:
Virtual Device Poll Mode Driver (PMD).

You are receiving this mail because:

You are the assignee for the bug.

=20=20=20=20=20=20=20=20=20=20

= --17385574170.6305df8e.2172042--