http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c4be0c1dc4cdc37b175579be1460f15ac6495e9a http://git.kernel.org/?p=linux/kernel/git/t

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c4be0c1dc4cdc37b175579be1460f15ac6495e9a http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6... would indicate that the ability to freeze has been added to other filesystems since ec2-consistent-snapshot was first written. I've got no data on whether they're equivalently robust. If freezing was the only reason to go for xfs, then that decision would seem to be open to more alternatives now.