832 vnode_pager_getpages(vm_object_t object, vm_page_t *m, int count, int *rbehind,  in vnode_pager_getpages()  argument
840 	rtval = VOP_GETPAGES(vp, m, count, rbehind, rahead);  in vnode_pager_getpages()
848     int *rbehind, int *rahead, vop_getpages_iodone_t iodone, void *arg)  in vnode_pager_getpages_async()  argument
854 	rtval = VOP_GETPAGES_ASYNC(vp, m, count, rbehind, rahead, iodone, arg);  in vnode_pager_getpages_async()
901 	int error, before, after, rbehind, rahead, poff, i;  in vnode_pager_generic_getpages()  local
1007 	rbehind = a_rbehind ? *a_rbehind : 0;  in vnode_pager_generic_getpages()
1009 	rbehind = min(rbehind, before);  in vnode_pager_generic_getpages()
1016 	if (rbehind + rahead + count > atop(maxphys)) {  in vnode_pager_generic_getpages()
1019 		trim = rbehind + rahead + count - atop(maxphys) + 1;  in vnode_pager_generic_getpages()
1020 		sum = rbehind + rahead;  in vnode_pager_generic_getpages()
1021 		if (rbehind == before) {  in vnode_pager_generic_getpages()
1023 			rbehind -= roundup(trim * rbehind / sum, pagesperblock);  in vnode_pager_generic_getpages()
1024 			if (rbehind < 0)  in vnode_pager_generic_getpages()
1025 				rbehind = 0;  in vnode_pager_generic_getpages()
1027 			rbehind -= trim * rbehind / sum;  in vnode_pager_generic_getpages()
1030 	KASSERT(rbehind + rahead + count <= atop(maxphys),  in vnode_pager_generic_getpages()
1032 	    rbehind, rahead, count, maxphys));  in vnode_pager_generic_getpages()
1041 	if (rbehind != 0 || rahead != 0) {  in vnode_pager_generic_getpages()
1044 		    &rbehind, &rahead, m);  in vnode_pager_generic_getpages()
1050 	bp->b_blkno -= IDX_TO_OFF(rbehind) / DEV_BSIZE;  in vnode_pager_generic_getpages()
1051 	bp->b_pgbefore = rbehind;  in vnode_pager_generic_getpages()
1053 	bp->b_npages = rbehind + count + rahead;  in vnode_pager_generic_getpages()