Andreas Gruenbacher 20be493b78 gfs2: Even more gfs2_find_jhead fixes
Fix several issues in the previous gfs2_find_jhead fix:
* When updating @blocks_submitted, @block refers to the first block block not
  submitted yet, not the last block submitted, so fix an off-by-one error.
* We want to ensure that @blocks_submitted is far enough ahead of @blocks_read
  to guarantee that there is in-flight I/O.  Otherwise, we'll eventually end up
  waiting for pages that haven't been submitted, yet.
* It's much easier to compare the number of blocks added with the number of
  blocks submitted to limit the maximum bio size.
* Even with bio chaining, we can keep adding blocks until we reach the maximum
  bio size, as long as we stop at a page boundary.  This simplifies the logic.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Bob Peterson <rpeterso@redhat.com>
2020-05-29 17:00:24 +02:00
..
2019-07-03 14:45:18 +02:00
2020-05-08 15:15:12 +02:00
2019-09-04 20:22:17 +02:00
2020-05-29 17:00:24 +02:00
2019-06-08 12:52:42 -07:00
2020-05-06 21:25:26 +02:00