From owner-freebsd-virtualization@freebsd.org Mon Jul 31 15:44:12 2017 Return-Path: Delivered-To: freebsd-virtualization@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id CBC6FDB18F7 for ; Mon, 31 Jul 2017 15:44:12 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id B9CF37FDC8 for ; Mon, 31 Jul 2017 15:44:12 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id v6VFiBeb014655 for ; Mon, 31 Jul 2017 15:44:12 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-virtualization@FreeBSD.org Subject: [Bug 215737] [bhyve] utilizing virtio-net truncates jumbo frames at 4084 bytes length Date: Mon, 31 Jul 2017 15:44:11 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: misc X-Bugzilla-Version: 11.0-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: grehan@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-virtualization@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc 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 MIME-Version: 1.0 X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Discussion of various virtualization techniques FreeBSD supports." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 31 Jul 2017 15:44:12 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D215737 Peter Grehan changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |grehan@FreeBSD.org --- Comment #4 from Peter Grehan --- (In reply to Harald Schmalzbauer from comment #3) Yes, it is a bug in bhyve's virtio-net code, where the 'merged rx-buffer' feature isn't implemented to spec. It only uses a single guest buffer, whic= h is usually 2K or 4K. The virtio-net code needs some restructuring to request t= he virtio common code to look for enough buffers to cover the size of the inco= ming packet, and to be able to return the length used in each of these back to t= he common code. Also as you mentioned, the e1000 emulation doesn't currently work with netm= ap. There have been patches supplied to fix this - they just need to be tested/integrated. --=20 You are receiving this mail because: You are the assignee for the bug.=