Panic after hung rsync, probably zfs related

[Xin LI]

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Ben Stuyts wrote:
| Hi,
|
| While doing an rsync from a zfs filesystem to an external usb hd (also
| zfs), the rsync processes hung in zfs state. I could not kill these
| processes, although the rest of the server seemingly continued to run
| fine. The reboot command did not work. Next I tried a shutdown now
| command. This caused a panic:

Sound like you somehow run out of memory, there is an known issue with
ZFS which causes livelock when there is memory pressure.  Which rsync
version are you using?  With rsync 3.x the memory usage would drop
drastically which would help to prevent this from happening.

Cheers,
- --
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|>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Xin LI <delphij at delphij.net>	http://www.delphij.net/
FreeBSD - The Power to Serve!
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