Hi, The loop direct I/O patches[1] have been merged to linus kernel tree and will be released in v4.4. So the two patches provide interfaces for using direct IO/AIO in losetup. include/loopdev.h | 4 ++++ lib/loopdev.c | 40 ++++++++++++++++++++++++++++++++++++++++ sys-utils/losetup.c | 30 +++++++++++++++++++++++++++--- 3 files changed, 71 insertions(+), 3 deletions(-) [1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bc07c10a3603a5ab3ef01ba42b3d41f9ac63d1b6 Thanks, Ming -- To unsubscribe from this list: send the line "unsubscribe util-linux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html