From nobody Mon Sep 29 18:32:36 2025 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 4cb8tr4pJKz68dsC for ; Mon, 29 Sep 2025 18:32:36 +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 "R12" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4cb8tr4JKwz3gv3 for ; Mon, 29 Sep 2025 18:32:36 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1759170756; 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; 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Mon, 29 Sep 2025 18:32:36 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 58TIWaC8014527 for net@FreeBSD.org; Mon, 29 Sep 2025 18:32:36 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 289907] cxlv: problem with receive checksum offload Date: Mon, 29 Sep 2025 18:32:36 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: john@jnielsen.net X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: np@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" 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=3D289907 --- Comment #2 from John Nielsen --- See also my post about this issue and followups: https://lists.freebsd.org/archives/freebsd-net/2025-September/007641.html Michael has pinpointed the issue much more clearly than I was able to, but would love a fix that allows rxcsum on cxgbev to work correctly without any additional tuning or configuration. Happy to provide information from any of the machines I have, including a FreeBSD 14-STABLE host with a T520 card and bhyve VMs (working correctly wi= th cxgbev) and an Arch Linux host with a T520 card and KVM/libvirtd VMs (anoth= er guest running Windows 11 works correctly, FreeBSD guest needs -rxcsum to process incoming packets). The FreeBSD VM is running 15-STABLE as of Saturd= ay (15.0-ALPHA4) but also showed the same behavior under 14-STABLE. If comparison on the same hardware would be useful I can also boot the Arch Linux machine into FreeBSD temporarily and run a bhyve VM to see if it still exhibits the problem. --=20 You are receiving this mail because: You are on the CC list for the bug.=