mm/debug:

When dumping struct page information, __dump_page() prints the page type with a trailing blank followed by the page flags on a separate line:

anon
flags: 0x100000000090034(uptodate|lru|active|head|swapbacked)

Fix this by using pr_cont() instead of pr_warn() to get a single line:

anon flags: 0x100000000090034(uptodate|lru|active|head|swapbacked)

Signed-off-by Ralph Campbell <[email protected]>

---
 mm/debug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

mm/debug.c +0 -0

index 8345bb6e4769..752c78721ea0 100644

Quoted 20 lines · On Mon, 11 Nov 2019 14:49:35 -0800 Ralph Campbell <[email protected]> wrote:

When dumping struct page information, __dump_page() prints the page type with a trailing blank followed by the page flags on a separate line:

anon
flags: 0x100000000090034(uptodate|lru|active|head|swapbacked)

Fix this by using pr_cont() instead of pr_warn() to get a single line:

anon flags: 0x100000000090034(uptodate|lru|active|head|swapbacked)

Signed-off-by Ralph Campbell <[email protected]>

---
  mm/debug.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

mm/debug.c +0 -0

index 8345bb6e4769..752c78721ea0 100644

mm/debug.c void __dump_page(struct page *page, const char *reason) · line 93

Quoted 8 lines

mm/debug.c +1 -1

@@ -87,7 +87,7 @@ void __dump_page(struct page *page, const char *reason)
  	}
  	BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1);
 
-	pr_warn("flags: %#lx(%pGp)\n", page->flags, &page->flags);
+	pr_cont("flags: %#lx(%pGp)\n", page->flags, &page->flags);
 
  hex_only:
  	print_hex_dump(KERN_WARNING, "raw: ", DUMP_PREFIX_NONE, 32,

This is the case if PageAnon || PageKsm || mapping. If it is, say, PageSlab then we effectively do

	pr_warn("stuff-with-no-newline");
	pr_cont("\n");
	pr_cont("flags: ...\n");

does this work OK? what facility level will that "flags: " line get?