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Tue, 4 Nov 2025 13:24:44 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 5A4DOieN099155 for net@FreeBSD.org; Tue, 4 Nov 2025 13:24:44 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 290773] vtnet: Severe performance regression since D51686 Date: Tue, 04 Nov 2025 13:24:44 +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: 14.3-STABLE X-Bugzilla-Keywords: regression X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: lg@efficientip.com X-Bugzilla-Status: In Progress X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: tuexen@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=3D290773 --- Comment #6 from lg@efficientip.com --- (In reply to Michael Tuexen from comment #5) No nothing additional features used, no nat, no jail no ip forwarding, no tunnel The -txcsum was not intentional here but it is in my rc.conf, it some legacy default config I used. For some interface I had to disabled the txcsum and = it stayed. And indeed when I re-enabled it on the vtnet it is working fine. Yes I have the review D52765 I rebuilt the my kernel from stable/14 the 28 October 14.3-STABLE FreeBSD 14.3-STABLE #442 stable/14-n272729-a93e1b731ae4-dirty: = Tue Oct 28 01:25:44 UTC 2025 When I discovered the issues I check the latest modification and rebuild the kernel without some commit. First I revert review D52684 but I still had the issues, then I revert the review D52765 and I get back my normal behaviour. Sorry I just see that I made a mistake in the title. I wanted to put D52765 If you need I am available to do some more test --=20 You are receiving this mail because: You are on the CC list for the bug.=