mm/debug: use %pGt to display page_type in dump_page()

Some page flags are stored in page_type rather than ->flags field.
Use newly introduced page type %pGt in dump_page().

Below are some examples:

page:00000000da7184dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101cb3
flags: 0x2ffff0000000000(node=0|zone=2|lastcpupid=0xffff)
page_type: 0xffffffff()
raw: 02ffff0000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: newly allocated page

page:00000000da7184dd refcount:0 mapcount:-128 mapping:0000000000000000 index:0x0 pfn:0x101cb3
flags: 0x2ffff0000000000(node=0|zone=2|lastcpupid=0xffff)
page_type: 0xffffff7f(buddy)
raw: 02ffff0000000000 ffff88813fff8e80 ffff88813fff8e80 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffff7f 0000000000000000
page dumped because: freed page

page:0000000042202316 refcount:3 mapcount:2 mapping:0000000000000000 index:0x7f634722a pfn:0x11994e
memcg:ffff888100135000
anon flags: 0x2ffff0000080024(uptodate|active|swapbacked|node=0|zone=2|lastcpupid=0xffff)
page_type: 0x1()
raw: 02ffff0000080024 0000000000000000 dead000000000122 ffff8881193398f1
raw: 00000007f634722a 0000000000000000 0000000300000001 ffff888100135000
page dumped because: user-mapped page

Link: https://lkml.kernel.org/r/20230130042514.2418-4-42.hyeyoo@gmail.com
Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Joe Perches <joe@perches.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/debug.c b/mm/debug.c
index 01cf0435723b224c57f0a9f3f5fa7a021f33f4ab..c7b228097bd98f1fd89c88093380151380884073 100644 (file)
--- a/mm/debug.c
+++ b/mm/debug.c
@@ -120,6 +120,8 @@ static void __dump_page(struct page *page)
 
        pr_warn("%sflags: %pGp%s\n", type, &head->flags,
                page_cma ? " CMA" : "");
+       pr_warn("page_type: %pGt\n", &head->page_type);
+
        print_hex_dump(KERN_WARNING, "raw: ", DUMP_PREFIX_NONE, 32,
                        sizeof(unsigned long), page,
                        sizeof(struct page), false);