On 12/09/16 16:43, Chris Murphy wrote: >> If compression has nothing to do with this, then this is heavy >> fragmentation. > > It's probably not that fragmented. Due to compression, metadata > describes 128KiB extents even though the data is actually contiguous. > > And it might be the same thing in my case also, even though no > compression is involved.
In that case you can quickly collapse physically contiguous ranges by reflink-mv'ing (ie. a recent mv) the file across subvolume boundaries and back. :) -h -- 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
