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Sun, 17 May 2026 18:00:56 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: virtualization@FreeBSD.org Subject: [Bug 273372] SR-IOV Networking in Bhyve Causes Chelsio T520-SO-CR to Fail on Host, Kernel Panic if Reset Date: Sun, 17 May 2026 18:00:55 +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: 14.0-STABLE X-Bugzilla-Keywords: bhyve, crash X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: john@jnielsen.net X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: virtualization@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: Discussion List-Archive: https://lists.freebsd.org/archives/freebsd-virtualization List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-virtualization@freebsd.org Sender: owner-freebsd-virtualization@FreeBSD.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D273372 --- Comment #13 from John Nielsen --- I obviously can=E2=80=99t speak for the OP, but I have two T520-LL-CR cards= . One has a built-in fan. It has always worked flawlessly across multiple systems, OSes= and workloads. The other has a bigger heatsink but no fan. It always seemed to = work until the system got some load or had been up for a certain period of time. Then the card would go completely out to lunch similar to what is described here. Then I checked the dev.t5nex.0.temperature sysctl and was shocked to see it well over 100C. I installed a fan next to the card and it has been trouble-= free ever since. Current temp reading is 68C. Running FreeBSD 14.3 doing sr-iov and passing a VF to a bhyve guest. Rock solid. --=20 You are receiving this mail because: You are the assignee for the bug.=