On Thu, Sep 06, 2012 at 09:11:53AM -0400, Josef Bacik wrote: > 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 <l...@cn.fujitsu.com> > > Signed-off-by: Liu Bo <bo.li....@oracle.com> > > --- > > v2: rebase against the latest btrfs-repo > > > > Heh well it doesn't apply onto btrfs-next, try again please :). Thanks, > > Josef
oh, sorry for the trouble, I'll redo a btrfs-next version :) thanks, liubo -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
