tree 5ca5ef3c31f24a7a11989d8a6a163eed9aaf9528
parent 3a4b0eda8e4b27e6aca86f9f4d327c1070815e30
author Jens Axboe <axboe@fb.com> 1403648544 -0600
committer Jens Axboe <axboe@fb.com> 1403648544 -0600

block: add support for limiting gaps in SG lists

Another restriction inherited for NVMe - those devices don't support
SG lists that have "gaps" in them. Gaps refers to cases where the
previous SG entry doesn't end on a page boundary. For NVMe, all SG
entries must start at offset 0 (except the first) and end on a page
boundary (except the last).

Signed-off-by: Jens Axboe <axboe@fb.com>