On Fri, Jul 17, 2015 at 3:27 AM, Hannes Reinecke <h...@suse.de> wrote: > Currently the loop driver just simulates 512-byte blocks. When > creating images for virtual machines it might be required to use > a different physical blocksize (eg 4k for S/390 DASD).
Looks 'qemu-img create' doesn't have parameter of block size, so could you share your use case? And I am just curious why 512-byte can't work for this case. > This patchset extends the current LOOP_SET_STATUS64 ioctl to > set the logical and physical blocksize by re-using the existing > 'init' fields, which are currently unused. > > As usual, comments and reviews are welcome. > > Hannes Reinecke (4): > loop: Enable correct physical blocksize > loop: Remove unused 'bdev' argument from loop_set_capacity > loop: Add 'lo_logical_blocksize' > loop: Pass logical blocksize in 'lo_init[0]' ioctl field > > drivers/block/loop.c | 35 ++++++++++++++++++++++++++++++----- > drivers/block/loop.h | 1 + > include/uapi/linux/loop.h | 1 + > 3 files changed, 32 insertions(+), 5 deletions(-) > > -- > 1.8.5.2 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
