From owner-freebsd-bugs@freebsd.org Wed Dec 30 01:03:18 2015 Return-Path: Delivered-To: freebsd-bugs@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 41BC6A55D08 for ; Wed, 30 Dec 2015 01:03:18 +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 1A77510B1 for ; Wed, 30 Dec 2015 01:03:18 +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 tBU13HQn031596 for ; Wed, 30 Dec 2015 01:03:17 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 205708] Kernel panic possibly happening while adding/removing/listing ZFS snapshot Date: Wed, 30 Dec 2015 01:03:18 +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: 10.2-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: root_dfjo1hpy@meo.ws X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-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 cc 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: 2.1.20 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Dec 2015 01:03:18 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D205708 Bug ID: 205708 Summary: Kernel panic possibly happening while adding/removing/listing ZFS snapshot Product: Base System Version: 10.2-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: root_dfjo1hpy@meo.ws CC: freebsd-amd64@FreeBSD.org CC: freebsd-amd64@FreeBSD.org Hi, recently my FreeBSD system running ZFS started to crash every now and then.= I think the bug is somehow associated with the amount of datastores*snapshots= I'm having. The system was actually running fine with snapshots done/deleted every 10 minutes, every 30 minutes, every hour, 6 hours, 12 hours, 24 hours and every week until it started to behave strange and started to crash. I then rebooted the system, checked everything and even replaced hardware t= hat might have caused this (memory, CPU, motherboard, HBA, basically everything= but the disks itself) with the same or similar hardware that was available. Then suddenly, the second crash, this time FreeBSD didn't do any kernel dum= p or anything similar but just print the stack trace on the monitor and freeze. = And stupid I was I rebooted without taking a picture, but I remember reading the same lines I had in the first crash (which is attached). Stuff I changed about 1 day before the first crash happened: sysctl vfs.zfs.l2arc_noprefetch=3D1 zfs set sync=3Ddisabled data zfs set logbias=3Dthroughput data The system performed faster after these changes, the main reason was that t= he performance was not good enough to keep up with our virtual servers that we= 're running from iSCSI and NFS4. This is all I know at this time that should go in this bug report. Attached= are some files from the first crash that occurred. --=20 You are receiving this mail because: You are the assignee for the bug.=