On 2009-11-02, at 16:02, Eric Sandeen wrote:
Andreas Dilger wrote:
I thought Takashi Sato was working on allowing a filesystem freeze
ioctl from userspace? This would hook into the filesystem-specific
freeze code so that when the ioctl() returns the on-disk filesystem
is fully consistent and does not even require journal replay.
That's in and done; most recent xfsprogs' xfs_freeze utility will
even freeze non-xfs filesystems now :) Otherwise a wrapper utility
around the ioctl would be trivial to write.
It probably makes sense to add a tune2fs option to freeze and unfreeze
the
filesystem? That would allow ext* users to have an available/documented
command even if they don't have xfsprogs installed.
Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.
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