David Sterba posted on Thu, 02 Apr 2015 17:19:31 +0200 as excerpted: > On Thu, Mar 26, 2015 at 10:19:24AM +0800, Qu Wenruo wrote: >> WARNING: To ensure *btrfs-convert* be able to rollback btrfs, one >> should never execute *btrfs filesystem defragment* or *btrfs balance* >> command on the converted btrfs. > I don't see now why defrag is harmful to rollback. The defragmented data > are written to the "ext free space", ie. where all new modifications get > written. The old data are pinned by the ext2_saved subvolume and can be > restored. Or not? Is defrag ever going to be snapshot-aware-enabled again? If not, then I don't see that (snapshot-unaware) defrag can affect ext2_saved either. But with snapshot-aware-defrag, AFAIK defrag would affect ext2_saved, unless of course it was special-cased... -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
