[PATCH v2 8/9] mm, page_alloc: print symbolic gfp_flags on allocation failure

From: Vlastimil Babka <vbabka@suse.cz>
To: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Joonsoo Kim <iamjoonsoo.kim@lge.com>,
	Minchan Kim <minchan@kernel.org>,
	Sasha Levin <sasha.levin@oracle.com>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Mel Gorman <mgorman@suse.de>, Michal Hocko <mhocko@suse.cz>,
	Vlastimil Babka <vbabka@suse.cz>
Subject: [PATCH v2 8/9] mm, page_alloc: print symbolic gfp_flags on allocation failure
Date: Tue, 24 Nov 2015 13:36:20 +0100	[thread overview]
Message-ID: <1448368581-6923-9-git-send-email-vbabka@suse.cz> (raw)
In-Reply-To: <1448368581-6923-1-git-send-email-vbabka@suse.cz>

It would be useful to translate gfp_flags into string representation when
printing in case of an allocation failure, especially as the flags have been
undergoing some changes recently and the script ./scripts/gfp-translate needs
a matching source version to be accurate.

Example output:

stapio: page allocation failure: order:9, mode:0x2080020(GFP_ATOMIC)

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---
 mm/page_alloc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f806a1a..80349ac 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2711,9 +2711,9 @@ void warn_alloc_failed(gfp_t gfp_mask, unsigned int order, const char *fmt, ...)
 		va_end(args);
 	}
 
-	pr_warn("%s: page allocation failure: order:%u, mode:0x%x\n",
+	pr_warn("%s: page allocation failure: order:%u, mode:0x%x",
 		current->comm, order, gfp_mask);
-
+	dump_gfpflag_names(gfp_mask);
 	dump_stack();
 	if (!should_suppress_show_mem())
 		show_mem(filter);
-- 
2.6.3

