On Mon, Sep 17, 2012 at 03:58:56AM -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. > > Originally patch by Li Zefan <lizf@xxxxxxxxxxxxxx> > Signed-off-by: Liu Bo <bo.li.liu@xxxxxxxxxx> I was trying to fixup the rejects on this patch when I noticed there were no tabs, only spaces. Thats not going to work and now I have to go back and make sure none of your other patches did this. Thanks, Josef -- 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
