Date: Wed, 30 Dec 2015 01:03:18 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 205708] Kernel panic possibly happening while adding/removing/listing ZFS snapshot Message-ID: <bug-205708-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205708 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 that 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 dump 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=1 zfs set sync=disabled data zfs set logbias=throughput data The system performed faster after these changes, the main reason was that the 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. -- You are receiving this mail because: You are the assignee for the bug.
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