1 This patch changes max request size to <chunk size> * <disks>
2 in order to allow Lustre to submit large I/Os and avoid
5 Index: linux-2.6.9/drivers/md/raid5.c
6 ===================================================================
7 --- linux-2.6.9.orig/drivers/md/raid5.c 2006-05-22 00:01:30.000000000 +0400
8 +++ linux-2.6.9/drivers/md/raid5.c 2006-05-22 00:09:56.000000000 +0400
9 @@ -1609,6 +1609,11 @@ static int run (mddev_t *mddev)
10 mddev->queue->unplug_fn = raid5_unplug_device;
11 mddev->queue->issue_flush_fn = raid5_issue_flush;
13 + /* in order to support large I/Os */
14 + blk_queue_max_sectors(mddev->queue, mddev->chunk_size * mddev->raid_disks >> 9);
15 + mddev->queue->max_phys_segments = mddev->chunk_size * mddev->raid_disks >> PAGE_SHIFT;
16 + mddev->queue->max_hw_segments = mddev->chunk_size * mddev->raid_disks >> PAGE_SHIFT;;
18 PRINTK("raid5: run(%s) called.\n", mdname(mddev));
20 ITERATE_RDEV(mddev,rdev,tmp) {