Commit be9cd873 authored May 29, 2012 by Gavin Shan Committed by Linus Torvalds May 29, 2012

mm/buddy: dump PG_compound_lock page flag



The array pageflag_names[] does conversion from page flags into their
corresponding names so that a meaningful representation of the
corresponding page flag can be printed.  This mechanism is used while
dumping page frames.  However, the array missed PG_compound_lock.  So
the PG_compound_lock page flag would be printed as a digital number
instead of a meaningful string.

The patch fixes that and prints "compound_lock" for the PG_compound_lock
page flag.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 782182e5

mm/page_alloc.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -5972,6 +5972,9 @@ static struct trace_print_flags pageflag_names[] = {
		#endif
		#ifdef CONFIG_MEMORY_FAILURE
		{1UL << PG_hwpoison, "hwpoison" },
		#endif
		#ifdef CONFIG_TRANSPARENT_HUGEPAGE
		{1UL << PG_compound_lock, "compound_lock" },
		#endif
		{-1UL, NULL },
		};

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