On Sun, 5 Apr 2009, Stefan Bethke wrote: Stefan, Thanks for the input. > Am 04.04.2009 um 13:55 schrieb Mark Powell: >> My script takes a zfs snapshot, mounts the snapshot, backs it up using >> star, then umounts the snapshot. The panic seems to occur on the umount. > > This is a different panic from the one I was getting, but appears to occur > under the same circumstances. > > I managed to avoid the panic by keeping the snapshot until the next run of my > backup script, and not unmounting anything. Yeah, I got around it by avoiding the unmount. My script dates from 7-STABLE days, where a zfs bug caused the automounted snapdir e.g. .zfs/snapshot/star_L0_2009-04-04-16:57, to be missing a '..' entry. That prevented star from detecting that I was performing a true full backup. Thus my script directly mounted the snapshot to get a proper fs with a '..' entry and unmounted it when finished. Now the included version of zfs in 8-CURRENT doesn't have that bug any longer. So I've reverted to backing up the automounted snapdir. Consequently as I don't perform a mount I don't have to unmount either, effectively working around the bug. > See > <http://lists.freebsd.org/pipermail/freebsd-current/2009-February/003513.html> Do you know if a PR has been submitted for this one? Cheers. -- Mark Powell - UNIX System Administrator - The University of Salford Information & Learning Services, Clifford Whitworth Building, Salford University, Manchester, M5 4WT, UK. Tel: +44 161 295 6843 Fax: +44 161 295 5888 www.pgp.com for PGP keyReceived on Sun Apr 05 2009 - 09:15:09 UTC
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