From owner-freebsd-bugs@freebsd.org Fri Aug 14 18:27:07 2020 Return-Path: Delivered-To: freebsd-bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 017AC3C55D5 for ; Fri, 14 Aug 2020 18:27:07 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 4BSsNV6HN5z410Y for ; Fri, 14 Aug 2020 18:27:06 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id D55D63C54D8; Fri, 14 Aug 2020 18:27:06 +0000 (UTC) Delivered-To: bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id D3DBD3C55D4 for ; Fri, 14 Aug 2020 18:27:06 +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 "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BSsNV52tNz41SC for ; Fri, 14 Aug 2020 18:27:06 +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 76DA512697 for ; Fri, 14 Aug 2020 18:27:06 +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 07EIR6Vo051027 for ; Fri, 14 Aug 2020 18:27:06 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 07EIR6FB051026 for bugs@FreeBSD.org; Fri, 14 Aug 2020 18:27:06 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: bugs@FreeBSD.org Subject: [Bug 248659] random NVMe hick ups and system freezes Date: Fri, 14 Aug 2020 18:27:06 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new 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 Only Me X-Bugzilla-Who: driesm.michiels@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: 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-bugs@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 Aug 2020 18:27:07 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D248659 Bug ID: 248659 Summary: random NVMe hick ups and system freezes Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: driesm.michiels@gmail.com When doing very low intensive stuff (like checking out the ports tree over = WIFI g at like 6 MB/s) on my laptop (Lenovo T490) running KDE5, my disk IO seems= to partially stall for a few seconds and then just continue. I have also obser= ved frequent system freezes/deadlocks with no debug info what so ever, no kernel dump, etc. I'm leaning towards VFS deadlocks although I'm kind off in the shadow on how to proceed further to debug this issue. The reason I suspect = the VFS stack is that I also observe the random freezes when not running any GU= I, just console based interaction. Maybe a driver that I'm loading? See video link for what I'm experiencing (https://youtu.be/1_ll4OBefjo). I am running 13-CURRENT and have a Samsung NVMe drive (PM981a) running the = UFS file system. I have disable SU-journaling but doesn't seem to help. I really like the look and feel of KDE5 on my laptop although its just not usable in this state with frequent data loss due to the system freezes and hard reset= s. Trim is disabled through tunefs on this drive as I've read that could be a cause for the problem I describe. Although any of the filesystem settings d= on't seem to help. I'd very much appreciate someone bearing with me into debugging this issue. I have also tried disabling all debugging related features in the kernel th= at should be disabled in stable branches but that didn't help either, so will probably reenable to debug. --=20 You are receiving this mail because: You are the assignee for the bug.=