1. 16 Mar, 2010 1 commit
    • NeilBrown's avatar
      md: deal with merge_bvec_fn in component devices better. · 627a2d3c
      NeilBrown authored
      If a component device has a merge_bvec_fn then as we never call it
      we must ensure we never need to.  Currently this is done by setting
      max_sector to 1 PAGE, however this does not stop a bio being created
      with several sub-page iovecs that would violate the merge_bvec_fn.
      
      So instead set max_segments to 1 and set the segment boundary to the
      same as a page boundary to ensure there is only ever one single-page
      segment of IO requested at a time.
      
      This can particularly be an issue when 'xen' is used as it is
      known to submit multiple small buffers in a single bio.
      Signed-off-by: default avatarNeilBrown <neilb@suse.de>
      Cc: stable@kernel.org
      627a2d3c
  2. 08 Mar, 2010 1 commit
  3. 07 Mar, 2010 38 commits