• Andreas Gruenbacher's avatar
    gfs2: Even more gfs2_find_jhead fixes · 20be493b
    Andreas Gruenbacher authored
    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: default avatarAndreas Gruenbacher <agruenba@redhat.com>
    Reviewed-by: default avatarBob Peterson <rpeterso@redhat.com>
    20be493b
lops.c 27.9 KB