Date: Wed, 30 Dec 2015 01:03:18 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-amd64@FreeBSD.org Subject: [Bug 205708] Kernel panic possibly happening while adding/removing/listing ZFS snapshot Message-ID: <bug-205708-6@https.bugs.freebsd.org/bugzilla/>
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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 on the CC list for the bug.=
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