At now btrfs_dedupe_file_range() restricted to 16MiB range for limit locking time and memory requirement for dedup ioctl()
For too big input range code silently set range to 16MiB Let's remove that restriction by do iterating over dedup range. That's backward compatible and will not change anything for request less then 16MiB. Changes: v1 -> v2: - Refactor btrfs_cmp_data_prepare and btrfs_extent_same - Store memory of pages array between iterations - Lock inodes once, not on each iteration - Small inplace cleanups v2 -> v3: - Split to several patches Timofey Titovets (3): Btrfs: split btrfs_extent_same() for simplification Btrfs: btrfs_dedupe_file_range() ioctl, remove 16MiB restriction Btrfs: btrfs_extent_same() reuse cmp workspace fs/btrfs/ioctl.c | 161 ++++++++++++++++++++++++++--------------------- 1 file changed, 91 insertions(+), 70 deletions(-) -- 2.17.0 -- 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