Date: Sun, 10 Oct 2010 17:34:39 +0200 From: Willem Jan Withagen <wjw@digiware.nl> To: fs@freebsd.org Subject: ZFS freeze/livelock Message-ID: <4CB1DD0F.6000209@digiware.nl>
next in thread | raw e-mail | index | archive | help
Hi, Just had my FreeBSD freeze on me with what I would think is sort of an livelock.... While I was receiving zfs snapshots on my data pool. Top and systat just kept running, but anything getting near a shell (and perhaps disk-io) ended up in: root@zfs.digiware.nl# gpart create -s gpt da6 load: 0.00 cmd: csh 12393 [zfsvfs->z_teardown_inactive_lock] 26.12r 0.00u 0.00s 0% 2480k load: 0.10 cmd: csh 12393 [zfsvfs->z_teardown_inactive_lock] 96.01r 0.00u 0.00s 0% 2480k Trying to execute to execute shutdown -r now had no effect what so ever. Neither did the three-finger salute. (Well at least not in 60 sec I was willing to wait.) Only way out of this situation was hard-reset. And I do have to admit I like ZFS for the speed it recovers after unexpected reboot. To bad there was no alt-ctrl-backspace escape to debugger compiled in. I'll do that with the next kernel, just in case. So the only data point I can give is the ^T output above. --WjW
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4CB1DD0F.6000209>