kern/137037: [zfs] [hang] zfs rollback on root causes FreeBSD to freeze in few seconds

[Pawel Jakub Dawidek]

On Wed, Aug 12, 2009 at 05:38:10AM +0000, pjd at FreeBSD.org wrote:
> Note that rollback of root file system is impossible to do on-line anyway.
> Rollback will modify data on your root file system and because of that
> file system being rolled back has to be unmounted and mounted with new data.
> You shouldn't be able to unmount root file system anyway.

Actually I was wrong here. Rollback is possible on a mounted file
system, it doesn't need to unmount file system, but it is still a risky
game.

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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