From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BFF5B1877 for ; Fri, 16 Aug 2024 03:26:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723778781; cv=none; b=iOC6IzrHzHevmBjNP4FCi76Z0ZpRPsUHCDNg3Rwx4bW+o37TySZRdChd3wdOIgV1ommyKI8oxzBYrBvOCvhza81Hozb2AA1p7r7dj1tMgVvSdxkccxxF/sUEf71mgKadEYIDeSVxg4KxePTrd/p31r5d/phtUH2ZDiaZMNi2rDQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723778781; c=relaxed/simple; bh=8fr5/mxtcsucWSFzNTVu49YAMh2goZ04rIV+0Q8FgKs=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=bkXv1T8IlU1k1M581dH9uXJBmkx5Kur9BPEoJRkVZvF2FYy2xtexTZdN5VTa96ieKK+oyj030UUKa+TLuh/XuSPQy3wTC3+kwiSyJzrCrI52GiFbNQ8jr03CFABka4NfA7XoVVIsFL2TxuqQwD8K89naAl4KzK1T+F8TFphRCsM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=V37zA4GU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="V37zA4GU" Received: by smtp.kernel.org (Postfix) with ESMTPS id 42585C4AF0D for ; Fri, 16 Aug 2024 03:26:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723778781; bh=8fr5/mxtcsucWSFzNTVu49YAMh2goZ04rIV+0Q8FgKs=; h=From:To:Subject:Date:In-Reply-To:References:From; b=V37zA4GUpLlehhdwgYastkPg+u/KjDuK1/KnbSqxluZeXOZQyzMyz1VDR7Lfjedte vg2iqPZ4yrvoR/NQGCHuIJf1r6/KcYXbyFC/r68jq7T/p5ot26Bx8rEKaksz1eI2Zq 4YvIMWe5OqRnE4cRX3CnRP2y/YnDlk7t4ILoI08cCTzUZns1cZSk7mNoeRmSkGm7qD x5QQmqwhChr8sDQCOZcUhMtw7LtZC8Hnr20PoZsqbrW4yxenZG1pMXZl0A/wxuKCiz NyfEfDo/995C3p2BXhUzYZjoZ10BMBwQ36V0UPM2CmezVGuNjtrvMTPGnUT6UW3I5x SHGCefkCh7AEw== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 36635C53BB7; Fri, 16 Aug 2024 03:26:21 +0000 (UTC) From: bugzilla-daemon@kernel.org To: kvm@vger.kernel.org Subject: [Bug 219161] VM with virtio-net doesn't receive large UDP packets (e.g 65507 bytes) from host Date: Fri, 16 Aug 2024 03:26:20 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Product: Virtualization X-Bugzilla-Component: kvm X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: wquan@redhat.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D219161 --- Comment #2 from wenli quan (wquan@redhat.com) --- (In reply to Sean Christopherson from comment #1) > On Thu, Aug 15, 2024, bugzilla-daemon@kernel.org wrote: > > Large UDP packets (e.g 65507 bytes) are not received in VM using virtio= -net > > when sent from host to VM, while smaller packets are received successfu= lly.=20 > >=20 > > The issue occurs with or without vhost enabled, and can be reproduce wi= th > > 6.5.0-rc5+ >=20 > Is this 100% reproducible? And did it first show up in 6.5-rc5, i.e. does > everything work as expected in 6.5-rc4? If so, bisecting will likely get > you a > fast root cause and fix, unless someone happens to know a likely suspect. Yes, it's 100% reproducible. I also tried with a very old version alongside 6.5-rc5, and the issue still occurs. Unfortunately, I'm not sure which vers= ion could be good, so I haven't started bisecting yet. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=