[PATCH] md: enable bypassing cache for reads

Call the chunk_aligned_read where appropriate. Signed-off-by: Neil Brown <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
ambv · Dec 10, 2006 · 5248861 · 5248861
1 parent 46031f9
commit 5248861
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
@@ -2808,6 +2808,11 @@ static int make_request(request_queue_t *q, struct bio * bi)
 	disk_stat_inc(mddev->gendisk, ios[rw]);
 	disk_stat_add(mddev->gendisk, sectors[rw], bio_sectors(bi));
 
+	if (bio_data_dir(bi) == READ &&
+	     mddev->reshape_position == MaxSector &&
+	     chunk_aligned_read(q,bi))
+            	return 0;
+
 	logical_sector = bi->bi_sector & ~((sector_t)STRIPE_SECTORS-1);
 	last_sector = bi->bi_sector + (bi->bi_size>>9);
 	bi->bi_next = NULL;