lustre/kernel_patches/patches/raid5-large-io-rhel5.patch

   1 diff -pur linux-2.6.18-53.orig/drivers/md/raid5.c linux-2.6.18-53/drivers/md/raid5.c
   2 --- linux-2.6.18-53.orig/drivers/md/raid5.c     2007-12-06 17:26:27.000000000 +0800
   3 +++ linux-2.6.18-53/drivers/md/raid5.c  2007-12-06 17:26:55.000000000 +0800
   4 @@ -3340,6 +3340,11 @@ static int run(mddev_t *mddev)
   5         mddev->array_size =  mddev->size * (conf->previous_raid_disks -
   6                                             conf->max_degraded);
   7
   8 +       /* in order to support large I/Os */
   9 +       blk_queue_max_sectors(mddev->queue, conf->chunk_size * conf->previous_raid_disks >> 9);
  10 +       mddev->queue->max_phys_segments = conf->chunk_size * conf->previous_raid_disks >> PAGE_SHIFT;
  11 +       mddev->queue->max_hw_segments = conf->chunk_size * conf->previous_raid_disks >> PAGE_SHIFT;;
  12 +
  13         return 0;
  14  abort:
  15         if (conf) {