From nobody Tue Mar 10 20:46:30 2026 X-Original-To: dev-commits-src-all@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4fVmBk3t1Bz6V2d6; Tue, 10 Mar 2026 20:46:38 +0000 (UTC) (envelope-from imb@protected-networks.net) Received: from mail.protected-networks.net (mail.protected-networks.net [IPv6:2001:470:8d59:1::8]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "mail.protected-networks.net", Issuer "R12" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4fVmBj3DjPz3Jwg; Tue, 10 Mar 2026 20:46:37 +0000 (UTC) (envelope-from imb@protected-networks.net) Authentication-Results: mx1.freebsd.org; dkim=pass header.d=protected-networks.net header.s=201508 header.b=TWwSFCmE; dmarc=pass (policy=reject) header.from=protected-networks.net; spf=pass (mx1.freebsd.org: domain of imb@protected-networks.net designates 2001:470:8d59:1::8 as permitted sender) smtp.mailfrom=imb@protected-networks.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d= protected-networks.net; h=content-transfer-encoding:content-type :content-type:in-reply-to:from:from:content-language:references :subject:subject:user-agent:mime-version:date:date:message-id; s=201508; t=1773175590; bh=+My2ry4SPkF5DNA+07hu5MVwo3QIx29WD2JZ 6bQ/iLA=; b=TWwSFCmE+KQM/RtsD241Fc+Z04z7S5ktSHMOf2PoWGNWqBG93Emq DtLOXNUsRehjOKcfxl9HNEkkSNDHZWrq0zU9MWokiyvC2oN2atcSP+/c6h0C1XmT z+NYovrnlJ/oH91Nic+GlCJQVleVsElZERWwY4oqkzkj2PEA8VUqRHo= Received: from [192.168.1.9] (d5540.auburn.protected-networks.net [192.168.1.9]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: imb@mail.protected-networks.net) by mail.protected-networks.net (Postfix) with ESMTPSA id 4DE8B6AF65; Tue, 10 Mar 2026 16:46:30 -0400 (EDT) Message-ID: <2d25962d-d2fd-41e5-8aec-2ffad3622024@protected-networks.net> Date: Tue, 10 Mar 2026 16:46:30 -0400 List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-all@freebsd.org Sender: owner-dev-commits-src-all@FreeBSD.org MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: git: c499ad6f997c - main - virtio: Use bus_dma for ring and indirect buffer allocations [Really: kernel: vtnet0: watchdog timeout on queue xx] To: Mark Millard , "Herbert J. Skuhra" , Andrew Turner Cc: dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org, freebsd-current , Philip Paeps References: <69a71c75.40215.43f39fc6@gitrepo.freebsd.org> <87ecludxuh.wl-herbert@gojira.at> <15dd35da-4c7c-482b-a212-8eaf761b23ca@yahoo.com> Content-Language: en-NZ From: Michael Butler In-Reply-To: <15dd35da-4c7c-482b-a212-8eaf761b23ca@yahoo.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spamd-Result: default: False [-4.00 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-0.999]; DMARC_POLICY_ALLOW(-0.50)[protected-networks.net,reject]; R_DKIM_ALLOW(-0.20)[protected-networks.net:s=201508]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.10)[text/plain]; TO_DN_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; ASN(0.00)[asn:6939, ipnet:2001:470::/32, country:US]; RCVD_COUNT_ONE(0.00)[1]; MIME_TRACE(0.00)[0:+]; RCPT_COUNT_SEVEN(0.00)[7]; MID_RHS_MATCH_FROM(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; FREEMAIL_TO(0.00)[yahoo.com,gojira.at,FreeBSD.org]; RCVD_TLS_ALL(0.00)[]; MLMMJ_DEST(0.00)[dev-commits-src-all@FreeBSD.org,dev-commits-src-main@FreeBSD.org,freebsd-current@freebsd.org]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[protected-networks.net:+] X-Rspamd-Queue-Id: 4fVmBj3DjPz3Jwg X-Spamd-Bar: --- Commit 1a92fc9 appears to work around the issue on amd64. Thanks! On 3/8/26 22:40, Mark Millard wrote: > On 3/8/26 10:39, Herbert J. Skuhra wrote: >> On Tue, 03 Mar 2026 18:37:57 +0100, Andrew Turner wrote: >>> >>> The branch main has been updated by andrew: >>> >>> URL: https://cgit.FreeBSD.org/src/commit/?id=c499ad6f997c8c5f61c88925e6d1e826d0c0f6c4 >>> >>> commit c499ad6f997c8c5f61c88925e6d1e826d0c0f6c4 >>> Author: Sarah Walker >>> AuthorDate: 2026-03-03 16:08:11 +0000 >>> Commit: Andrew Turner >>> CommitDate: 2026-03-03 16:29:15 +0000 >>> >>> virtio: Use bus_dma for ring and indirect buffer allocations >>> >>> While the majority of virtio platforms will be fully coherent, some may >>> require cache maintenance or other specific device memory handling (eg for >>> secure partitioning). Using bus_dma allows for these usecases. >>> >>> The virtio buffers are marked as coherent; this should ensure that sync >>> calls are no-ops in the common cases. >>> >>> Reviewed by: andrew >>> Sponsored by: Arm Ltd >>> Differential Revision: https://reviews.freebsd.org/D54959 >>> --- >>> sys/dev/virtio/virtio_ring.h | 27 ++++-- >>> sys/dev/virtio/virtqueue.c | 216 +++++++++++++++++++++++++++++++++++++------ >>> 2 files changed, 209 insertions(+), 34 deletions(-) >> >> After this change I see a lot of "kernel: vtnet0: watchdog timeout on >> queue xx" errors on amd64 (arm64 seems to be OK). > > See below about other reports of the messages. > >> >> Reverting this commit resolves the issue. >> >> > > freebsd-current has the following notes, implicitly referencing official > builders doing official builds: > > QUOTE > On 3/8/26 17:10, Philip Paeps wrote: >> On 2026-03-08 07:10:01 (+0800), Michael Butler wrote: >>> Is anyone else seeing timeouts on virtual interfaces? e.g. >>> >>> Mar 7 15:00:27 george kernel: vtnet0: watchdog timeout on queue 0 >>> Mar 7 15:00:45 george kernel: vtnet0: watchdog timeout on queue 0 >> >> I started seeing these on today's build too. >> >> It seems to happen more or less randomly. I can't point at anything >> specific that might be triggering it. >> >> Philip >> >> > END QUOTE >