From nobody Fri Oct 21 08:58:47 2022 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 4Mtz0S4y83z4ftDV for ; Fri, 21 Oct 2022 08:58:48 +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 "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Mtz0S3vjGz3FpC for ; Fri, 21 Oct 2022 08:58:48 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) 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 4Mtz0S30J0z192d for ; Fri, 21 Oct 2022 08:58:48 +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 29L8wmX4032937 for ; Fri, 21 Oct 2022 08:58:48 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 29L8wmMZ032936 for net@FreeBSD.org; Fri, 21 Oct 2022 08:58:48 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 265588] [TCP] - tcp send a retransmission identical sequence number packet with different payload Date: Fri, 21 Oct 2022 08:58:47 +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: 13.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: rscheff@freebsd.org X-Bugzilla-Status: In Progress X-Bugzilla-Resolution: X-Bugzilla-Priority: Normal 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 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1666342728; 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=gz1aox1XSXvhRMdUR+2G6uwGSDPrJjHBXWhmVbAWA8g=; b=M3CJiWsyM/5apfn8PTIZVK+pY3szBr07ZS2nIqqJ5iOk3Fo+kbAXlxKgcAUzrL1/ECWV6j Q4+HKN+WcyEmM823ct5kilbc5s9cqP/78j3VSkSN2rNIUtEut6MYWhl6ZcpjHHYMHSycSB Pj6f/rCMmMdmzCEfnBhs6cTj6uQw0fm+OX8jVKg5uYOsBqBTU5Wro/OBceGGftVqBJhYPD ttSddakErOwyOwQNPRpdV6Z9MLvY13cuA3G0uty3Sc1UbNxN/Fsnu8XVGik7jjCkZwVo/u Vc29aNCcVI4+gStRPg5TgTEFPMoWzBJO11sKV3jUG8Jcb+cRxfNJx8mcC3tojw== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1666342728; a=rsa-sha256; cv=none; b=ReaccvKip+5BPvAJkX4x1KbidBn2duK4/PP7lrxGFtC6eMYdrc48rsXBYYQPBbVQb9HbJp v0Gzi7B7esSot5h0BSM6efn230q3gkwA41tOzhFk0gjpQato0iQ3inrrOAPUEgYAENh35B bV2Wxuu8TRQbKNqFjDIUnWKEcrQRfU35NVo4eBCL2g8+SSfaAMq0Kclx6rj+waFbswhtuM TtuLqbMHwo+qomeww6d5xBgrV6PuTwsT1R9jEb+vUawnAd4ej/jRbPWQIfpABezuzG1G3Z 2SIcKa/3n3J7XRGRcMuRjueDNzgBe2gRXGJz8L98EZttRe8uQl+DtE1jr9BHRA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D265588 --- Comment #22 from Richard Scheffenegger --- (In reply to Keyong from comment #21) Do you know, what devices are on the path between your fbds NFS server and = the Linux client? As you can see, the ACKs sent by the Linux client are correct: #41 ack 109097 #44 ack 111993 #45 ack 114889 #49 ack 129369=20 #52 ack 129369 sack 132265-135161 #53 ack 129369 sack 132265-139505 #54 NFSv4 READ, ack 129369 sack 132265-139505 On the FreeBSD server, we observe: #54 ack 111993 #56 ack 129369 sack 132265-135161 #58 ack 129369 sack 132265-139505 #59 ack 109097 #60 ack 114889 #61 ack 129369=20 #64 NFSv4 READ, ack 129369 sack 132265-139505 So there is significant reordering of the ACKs going on here, with the bug being triggered by the (server) #61 ACK. I wonder if this reordering is due to a middlebox, or perhaps some Queue reordering inside of the linux box, expediting "critical" ACKs (with SACK) = over normal ACKs... --=20 You are receiving this mail because: You are the assignee for the bug.=