On Mon, 16 Mar 2015, David Sterba wrote: > I think it's right, however I'm not sure if there are any guarantees > about the range alignment. Btrfs should be fine with 4k (ie. sectorsize > which is PAGE_SIZE) alignment for a node, but this could lead to some > pathological layout and I'm not 100% sure the exact nodesize alignment > is not required somewhere. Ah, I didn't think of that. Yes, ext2_alloc_block_range can allocate unaligned (with respect to nodesize) ranges. I made a test with a conversion that resulted in unaligned blocks[], and neither btrfs check nor scrub complained on the converted filesystem, but I will do some research to find out whether blocks[] must be aligned or not. -- Sebastian Thorarensen -- 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
