Index: linux-2.6.21-rc6/fs/bio.c
===================================================================
--- linux-2.6.21-rc6.orig/fs/bio.c	2007-04-11 15:41:37.000000000 -0700
+++ linux-2.6.21-rc6/fs/bio.c	2007-04-11 15:42:03.000000000 -0700
@@ -1189,7 +1189,7 @@ static void __init biovec_init_slabs(voi
 		struct biovec_slab *bvs = bvec_slabs + i;
 
 		size = bvs->nr_vecs * sizeof(struct bio_vec);
-		bvs->slab = kmem_cache_create(bvs->name, size, 0,
+		bvs->slab = kmem_cache_create(bvs->name, max(size, 32), 0,
                                 SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL, NULL);
 	}
 }