Re: [PATCH v4 16/19] selftests: ublk: support non-O_DIRECT backing files

On Thu, Jan 08, 2026 at 02:19:44AM -0700, Caleb Sander Mateos wrote:

A subsequent commit will add support for using a backing file to store integrity data. Since integrity data is accessed in intervals of metadata_size, which may be much smaller than a logical block on the backing device, direct I/O cannot be used. Add an argument to backing_file_tgt_init() to specify the number of files to open for direct I/O. The remaining files will use buffered I/O. For now, continue to request direct I/O for all the files.

Signed-off-by: Caleb Sander Mateos csander@purestorage.com

Reviewed-by: Ming Lei ming.lei@redhat.com

Thanks, Ming