[PATCH v2 1/3] mm, slub: use pGp to print page flags

From: Yafang Shao <laoar.shao@gmail.com>
To: andriy.shevchenko@linux.intel.com, david@redhat.com,
	vbabka@suse.cz, linmiaohe@huawei.com, cl@linux.com,
	penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com,
	akpm@linux-foundation.org, pmladek@suse.com, rostedt@goodmis.org,
	sergey.senozhatsky@gmail.com, linux@rasmusvillemoes.dk
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Yafang Shao <laoar.shao@gmail.com>
Subject: [PATCH v2 1/3] mm, slub: use pGp to print page flags
Date: Mon,  1 Feb 2021 19:56:08 +0800	[thread overview]
Message-ID: <20210201115610.87808-2-laoar.shao@gmail.com> (raw)
In-Reply-To: <20210201115610.87808-1-laoar.shao@gmail.com>

As pGp has been already introduced in printk, we'd better use it to make
the output human readable.

Before this change, the output is,
[ 6155.716018] INFO: Slab 0x000000004027dd4f objects=33 used=3 fp=0x000000008cd1579c flags=0x17ffffc0010200

While after this change, the output is,
[ 8846.517809] INFO: Slab 0x00000000f42a2c60 objects=33 used=3 fp=0x0000000060d32ca8 flags=0x17ffffc0010200(slab|head)

Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
---
 mm/slub.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index 34dcc09e2ec9..87ff086e68a4 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -638,8 +638,9 @@ void print_tracking(struct kmem_cache *s, void *object)
 
 static void print_page_info(struct page *page)
 {
-	pr_err("INFO: Slab 0x%p objects=%u used=%u fp=0x%p flags=0x%04lx\n",
-	       page, page->objects, page->inuse, page->freelist, page->flags);
+	pr_err("INFO: Slab 0x%p objects=%u used=%u fp=0x%p flags=%#lx(%pGp)\n",
+	       page, page->objects, page->inuse, page->freelist,
+	       page->flags, &page->flags);
 
 }
 
-- 
2.17.1

