From nobody Thu Jul 08 10:53:19 2021 X-Original-To: virtualization@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 6908E11F3372 for ; Thu, 8 Jul 2021 10:53:19 +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 4GLCnW2SyWz4db1 for ; Thu, 8 Jul 2021 10:53:19 +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 3EB831F93B for ; Thu, 8 Jul 2021 10:53:19 +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 168ArJen085121 for ; Thu, 8 Jul 2021 10:53:19 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 168ArJeZ085120 for virtualization@FreeBSD.org; Thu, 8 Jul 2021 10:53:19 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 256934] Panic in ena driver on a t3.large ec2 instance after upgrading to 13.0 Date: Thu, 08 Jul 2021 10:53:19 +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: 13.0-RELEASE X-Bugzilla-Keywords: panic, regression X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: ar@semihalf.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: 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 List-Id: Discussion List-Archive: https://lists.freebsd.org/archives/freebsd-virtualization List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-virtualization@freebsd.org X-BeenThere: freebsd-virtualization@freebsd.org MIME-Version: 1.0 X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D256934 Artur Rojek changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ar@semihalf.com --- Comment #2 from Artur Rojek --- (In reply to Alex Dupre from comment #0) Hi Alex, I researched this issue and there are no significant changes between 12.2 a= nd 13.0 with regards to your backtrace. I don't see any connection to the ena driver either, as `ena_keep_alive_wd+0x24` is a simple call of `counter_u64_zero`. The EC2 T3 instance type you are using is a burstable performance instance, meaning that (depending on your configuration) you can spend CPU resources above the baseline for periods of time, however eventua= lly the instance forcibly comes down to baseline CPU utilization. Perhaps you f= aced this bottleneck just when your machine required more CPU "oomph"? Have you been able to reproduce this issue on 13.0 since, or is this a one = time occurrence? One thing I can suggest at the moment is to try to adjust `debug.lock.delay_max`, which is configurable since 13.0. --=20 You are receiving this mail because: You are the assignee for the bug.=