On Wed, 2008-07-30 at 01:40 +0800, Yan Zheng wrote: > Hello, > > This is updated version of nodatacow patch. To check whether a given > file extent is referenced by multiple snapshots, the checker walks > down the fs tree through dead root and checks all tree blocks in the > path. We can easily detect whether a given tree block is directly > referenced by other snapshot. We can also detect any indirect > reference from other snapshot by checking reference's generation. The > checker can always detect multiple references, but can't reliably > detect cases of single reference. So btrfs may do file data cow even > there is only one reference. >
Wonderful, thanks! I'll put this in tonight or tomorrow morning. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
