1. 18 Sep, 2002 2 commits
    • Jens Axboe's avatar
      [PATCH] bio_add_page() · f8b46092
      Jens Axboe authored
      This is bio_add_page(), 100% identical to the version I sent out for
      comments earlier this week.  With the previous queue restriction patch,
      this guarentees that we can always add a page worth of data to the bio.
      bio_add_page() returns 0 on success, and 1 on failure.  Either the page
      is added completely, or the attempt is aborted.
      
      bio_add_page() uses the normal queue restrictions to determine whether
      we an add the page or not. if a queue has further restrictions, it can
      define a q->merge_bvec_fn() to further impose limits.
      
      Patch also includes changes to ll_rw_kio(), if for nothing else to
      demonstrate how to use this piece of instrastructure.
      f8b46092
    • Jens Axboe's avatar
      [PATCH] impose sane queue restrictions · efbb72f9
      Jens Axboe authored
      Impose sane limits on queue restrictions. that means:
      
       - q->max_sectors must be able to at least span a page
       - q->max_phys_segments and q->max_hw_segments must be at least 1
       - q->max_segment_size must be at least page sized
       - q->seg_boundary_mask must be at least PAGE_CACHE_SIZE-1
      efbb72f9
  2. 17 Sep, 2002 38 commits