On Fri, Aug 05, 2016 at 10:01:14AM +0300, Artem Bityutskiy wrote: > On Fri, 2016-08-05 at 09:50 +1000, Dave Chinner wrote: > > I'd much prefer that fiemap gives exact information about shared > > extents. FIEMAP is a diagnostic tool and as such we need it to > > accurately reflect the exact extent map of the inode being queried > > so we aren't mislead about the layout of the file during trouble > > shooting. > > Hi Dave, you are right, and here is a side note: we were using FIEMAP > for optimizing image deployment in production, so it is a diagnostic > tool and more. Yay, data corruption ahoy! Hasn't /anyone/ listened to the repeated statements from fs developers that FIEMAP is not a safe method of optimising data copying? -Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
