On Wed, Sep 05, 2012 at 07:10:52PM -0600, Liu Bo wrote: > This comes from one of btrfs's project ideas, > As we defragment files, we break any sharing from other snapshots. > The balancing code will preserve the sharing, and defrag needs to grow this > as well. > > Now we're able to fill the blank with this patch, in which we make full use of > backref walking stuff. > > Here is the basic idea, > o set the writeback ranges started by defragment with flag EXTENT_DEFRAG > o at endio, after we finish updating fs tree, we use backref walking to find > all parents of the ranges and re-link them with the new COWed file layout > by > adding corresponding backrefs. > > Original-Signed-off-by: Li Zefan <[email protected]> > Signed-off-by: Liu Bo <[email protected]> > --- > v2: rebase against the latest btrfs-repo >
Heh well it doesn't apply onto btrfs-next, try again please :). Thanks, Josef -- 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
