Excerpts from Mike Frysinger's message of 2011-02-19 19:53:18 -0500: > 2011/2/19 Pádraig Brady: > > On 19/02/11 18:28, Mike Frysinger wrote: > >> based on other threads (which i havent been following too closely), did we > >> settle on this being a btrfs bug ? > > > > Nope, cp 8.10 is not absolved yet. > > It may be btrfs not honoring FIEMAP_FLAG_SYNC, > > and/or it may be cp needing to handle FIEMAP_EXTENT_ENCODED > > specially. > > > > It would help if you ran `sync` before the copy, > > to exclude that as a possible issue. > > makes no difference after applying this patch:
I've got a fix for this on the btrfs side in testing. It is definitely a btrfs bug. -chris
