selftests-mm-move-gather_after_split_folio_orders-into-vm_utilc-file.patch removed from -mm tree

@@ -104,129 +104,6 @@ fail:
 	return false;
 }
 
-static int vaddr_pageflags_get(char *vaddr, int pagemap_fd, int kpageflags_fd,
-		uint64_t *flags)
-{
-	unsigned long pfn;
-
-	pfn = pagemap_get_pfn(pagemap_fd, vaddr);
-
-	/* non-present PFN */
-	if (pfn == -1UL)
-		return 1;
-
-	if (pageflags_get(pfn, kpageflags_fd, flags))
-		return -1;
-
-	return 0;
-}
-
-/*
- * gather_after_split_folio_orders - scan through [vaddr_start, len) and record
- * folio orders
- *
- * @vaddr_start: start vaddr
- * @len: range length
- * @pagemap_fd: file descriptor to /proc/<pid>/pagemap
- * @kpageflags_fd: file descriptor to /proc/kpageflags
- * @orders: output folio order array
- * @nr_orders: folio order array size
- *
- * gather_after_split_folio_orders() scan through [vaddr_start, len) and check
- * all folios within the range and record their orders. All order-0 pages will
- * be recorded. Non-present vaddr is skipped.
- *
- * NOTE: the function is used to check folio orders after a split is performed,
- * so it assumes [vaddr_start, len) fully maps to after-split folios within that
- * range.
- *
- * Return: 0 - no error, -1 - unhandled cases
- */
-static int gather_after_split_folio_orders(char *vaddr_start, size_t len,
-		int pagemap_fd, int kpageflags_fd, int orders[], int nr_orders)
-{
-	uint64_t page_flags = 0;
-	int cur_order = -1;
-	char *vaddr;
-
-	if (pagemap_fd == -1 || kpageflags_fd == -1)
-		return -1;
-	if (!orders)
-		return -1;
-	if (nr_orders <= 0)
-		return -1;
-
-	for (vaddr = vaddr_start; vaddr < vaddr_start + len;) {
-		char *next_folio_vaddr;
-		int status;
-
-		status = vaddr_pageflags_get(vaddr, pagemap_fd, kpageflags_fd,
-					&page_flags);
-		if (status < 0)
-			return -1;
-
-		/* skip non present vaddr */
-		if (status == 1) {
-			vaddr += psize();
-			continue;
-		}
-
-		/* all order-0 pages with possible false postive (non folio) */
-		if (!(page_flags & (KPF_COMPOUND_HEAD | KPF_COMPOUND_TAIL))) {
-			orders[0]++;
-			vaddr += psize();
-			continue;
-		}
-
-		/* skip non thp compound pages */
-		if (!(page_flags & KPF_THP)) {
-			vaddr += psize();
-			continue;
-		}
-
-		/* vpn points to part of a THP at this point */
-		if (page_flags & KPF_COMPOUND_HEAD)
-			cur_order = 1;
-		else {
-			vaddr += psize();
-			continue;
-		}
-
-		next_folio_vaddr = vaddr + (1UL << (cur_order + pshift()));
-
-		if (next_folio_vaddr >= vaddr_start + len)
-			break;
-
-		while ((status = vaddr_pageflags_get(next_folio_vaddr,
-						     pagemap_fd, kpageflags_fd,
-						     &page_flags)) >= 0) {
-			/*
-			 * non present vaddr, next compound head page, or
-			 * order-0 page
-			 */
-			if (status == 1 ||
-			    (page_flags & KPF_COMPOUND_HEAD) ||
-			    !(page_flags & (KPF_COMPOUND_HEAD | KPF_COMPOUND_TAIL))) {
-				if (cur_order < nr_orders) {
-					orders[cur_order]++;
-					cur_order = -1;
-					vaddr = next_folio_vaddr;
-				}
-				break;
-			}
-
-			cur_order++;
-			next_folio_vaddr = vaddr + (1UL << (cur_order + pshift()));
-		}
-
-		if (status < 0)
-			return status;
-	}
-	if (cur_order > 0 && cur_order < nr_orders)
-		orders[cur_order]++;
-	return 0;
-}
-
 static int check_after_split_folio_orders(char *vaddr_start, size_t len,
 		int pagemap_fd, int kpageflags_fd, int orders[], int nr_orders)
 {

@@ -240,7 +117,7 @@ static int check_after_split_folio_order
 		ksft_exit_fail_msg("Cannot allocate memory for vaddr_orders");
 
 	memset(vaddr_orders, 0, sizeof(int) * nr_orders);
-	status = gather_after_split_folio_orders(vaddr_start, len, pagemap_fd,
+	status = gather_folio_orders(vaddr_start, len, pagemap_fd,
 				     kpageflags_fd, vaddr_orders, nr_orders);
 	if (status)
 		ksft_exit_fail_msg("gather folio info failed\n");

125 lines not on this page · raw message

@@ -95,6 +95,8 @@ bool check_huge_file(void *addr, size_t
 bool check_huge_shmem(void *addr, size_t len, int nr_hpages, uint64_t hpage_size);
 int64_t allocate_transhuge(void *ptr, int pagemap_fd);
 int pageflags_get(unsigned long pfn, int kpageflags_fd, uint64_t *flags);
+int gather_folio_orders(char *vaddr_start, size_t len,
+		int pagemap_fd, int kpageflags_fd, int orders[], int nr_orders);
 
 int uffd_register(int uffd, void *addr, uint64_t len,
 		  bool miss, bool wp, bool minor);