lustre/kernel_patches/patches/raid6-large-io.patch

   1 --- linux-2.6.9.orig/drivers/md/raid6main.c     2006-09-07 23:12:09.000000000 +0800
   2 +++ linux-2.6.9/drivers/md/raid6main.c  2006-09-07 23:12:44.000000000 +0800
   3 @@ -1775,6 +1775,11 @@ static int run (mddev_t *mddev)
   4         mddev->queue->unplug_fn = raid6_unplug_device;
   5         mddev->queue->issue_flush_fn = raid6_issue_flush;
   6
   7 +       /* in order to support large I/Os */
   8 +       blk_queue_max_sectors(mddev->queue, mddev->chunk_size * mddev->raid_disks >> 9);
   9 +       mddev->queue->max_phys_segments = mddev->chunk_size * mddev->raid_disks >> PAGE_SHIFT;
  10 +       mddev->queue->max_hw_segments = mddev->chunk_size * mddev->raid_disks >> PAGE_SHIFT;
  11 +
  12         PRINTK("raid6: run(%s) called.\n", mdname(mddev));
  13
  14         ITERATE_RDEV(mddev,rdev,tmp) {