From nobody Mon Oct 21 19:59:37 2024 X-Original-To: net@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 4XXR3Z5Gd5z5ZhbH for ; Mon, 21 Oct 2024 19:59:38 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (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 (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R11" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4XXR3Z4B0jz4YCx for ; Mon, 21 Oct 2024 19:59:38 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1729540778; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=1TKc9gByGzNI9PjAYpmPQDG6z8xdRkrXUXzoH8CCPsQ=; b=BEMuu6ZoZlLVr6QzTgN97mLr++cN6AKH6zIjhmql4fXv9yDu7LmugGb3dggx2xbimgvGY1 t0aQSYCxh9KZ3q+YjSQcKj2Xlplg4Gp+7MbvrEMoZzQCx5wG++38OC9XnQjEBec+9CPmab gDnxBtPw31uNJWl4tjombhJy68zctHYiLZ5PIiPW/75Zhxi5tTzAp/99zNQILkFqt4F044 1POlXUh2aUTHDrmvuCjZ7z3gD9jNG3T9epgZkoa6WhD2arzYaPfuOg8cPLPFF2Rv3opczl aVVNKbCTUZO/KdyqVrjIdxF/jW64v/NjcOCNbWz9jp/1qi0aixvEywrmnvlydA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1729540778; a=rsa-sha256; cv=none; b=RqFPFH/qtGi3jjW0rrqPofd2kiQEzt13jwNa8/c7FZyS9j8mG4pc6nrmGpcC4MfeNMrIuk YLMlEK3AaP+bGA0JpW+1KNlW3q0oGkmSZJQoJc53w9cyD/TiJ/cDs0qbQ+JuieZjY7vO9B 77khiP7WnOt6k6a2bB/Y9965v3YsYutcV42yRKj8q3Y+BNqy9i43Ezj3e/lywbb0tiYHQC w9MPSGOFZWe2DzokL8HlzYTCRnwFMl9zZBz3b0W85lXoms3inhBb5TuILHCRkLtajE3D6H U76fO0IMSPP/cnfhpUi1xTpWCYebkrEZSTfDcn7OEsHzDzyXWPgN+/DlJYIUNw== Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (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 did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4XXR3Z3pBKzkgn for ; Mon, 21 Oct 2024 19:59:38 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 49LJxcBH075264 for ; Mon, 21 Oct 2024 19:59:38 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 49LJxcvn075263 for net@FreeBSD.org; Mon, 21 Oct 2024 19:59:38 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 280386] if_bridge throws output errors under load Date: Mon, 21 Oct 2024 19:59:37 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 14.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: kbowling@freebsd.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: net@FreeBSD.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://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D280386 --- Comment #21 from Kevin Bowling --- (In reply to pascal.guitierrez from comment #20) > Do you know if this is expected behaviour or is it a problem? Caveat it has been a long time since I have been line-rating large numbers = of FreeBSD systems so I may not be privy to all the developments in the network stack.. but I would say more /known/ than /expected/. With the if_bridge in play maybe you are more likely to see this since that may imply TSO was mas= ked off and you have a more expensive transmit path. I think https://reviews.freebsd.org/D4295 would be one way to fix the issue= but I am not sure it is the only or best way. In principle there isn't a problem because dropping packets is an expected behavior of overfull queues at any point of the network and TCP or other protocols should be dealing with it. But it is obviously suboptimal if we = have enough context to do something smarter. --=20 You are receiving this mail because: You are the assignee for the bug.=