vmscan: tracing: add trace events for kswapd wakeup, sleeping and direct reclaim

Add two trace events for kswapd waking up and going asleep for the
purposes of tracking kswapd activity and two trace events for direct
reclaim beginning and ending.  The information can be used to work out how
much time a process or the system is spending on the reclamation of pages
and in the case of direct reclaim, how many pages were reclaimed for that
process.  High frequency triggering of these events could point to memory
pressure problems.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Larry Woodman <lwoodman@redhat.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Michael Rubin <mrubin@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 37 deletions

diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h
index 3adca0ca9dbe..a9c87ad8331c 100644
--- a/include/trace/events/kmem.h
+++ b/include/trace/events/kmem.h
@@ -6,43 +6,7 @@
 
 #include <linux/types.h>
 #include <linux/tracepoint.h>
-
-/*
- * The order of these masks is important. Matching masks will be seen
- * first and the left over flags will end up showing by themselves.
- *
- * For example, if we have GFP_KERNEL before GFP_USER we wil get:
- *
- *  GFP_KERNEL|GFP_HARDWALL
- *
- * Thus most bits set go first.
- */
-#define show_gfp_flags(flags)                                           \
-        (flags) ? __print_flags(flags, "|",                             \
-        {(unsigned long)GFP_HIGHUSER_MOVABLE,   "GFP_HIGHUSER_MOVABLE"}, \
-        {(unsigned long)GFP_HIGHUSER,           "GFP_HIGHUSER"},        \
-        {(unsigned long)GFP_USER,               "GFP_USER"},            \
-        {(unsigned long)GFP_TEMPORARY,          "GFP_TEMPORARY"},       \
-        {(unsigned long)GFP_KERNEL,             "GFP_KERNEL"},          \
-        {(unsigned long)GFP_NOFS,               "GFP_NOFS"},            \
-        {(unsigned long)GFP_ATOMIC,             "GFP_ATOMIC"},          \
-        {(unsigned long)GFP_NOIO,               "GFP_NOIO"},            \
-        {(unsigned long)__GFP_HIGH,             "GFP_HIGH"},            \
-        {(unsigned long)__GFP_WAIT,             "GFP_WAIT"},            \
-        {(unsigned long)__GFP_IO,               "GFP_IO"},              \
-        {(unsigned long)__GFP_COLD,             "GFP_COLD"},            \
-        {(unsigned long)__GFP_NOWARN,           "GFP_NOWARN"},          \
-        {(unsigned long)__GFP_REPEAT,           "GFP_REPEAT"},          \
-        {(unsigned long)__GFP_NOFAIL,           "GFP_NOFAIL"},          \
-        {(unsigned long)__GFP_NORETRY,          "GFP_NORETRY"},         \
-        {(unsigned long)__GFP_COMP,             "GFP_COMP"},            \
-        {(unsigned long)__GFP_ZERO,             "GFP_ZERO"},            \
-        {(unsigned long)__GFP_NOMEMALLOC,       "GFP_NOMEMALLOC"},      \
-        {(unsigned long)__GFP_HARDWALL,         "GFP_HARDWALL"},        \
-        {(unsigned long)__GFP_THISNODE,         "GFP_THISNODE"},        \
-        {(unsigned long)__GFP_RECLAIMABLE,      "GFP_RECLAIMABLE"},     \
-        {(unsigned long)__GFP_MOVABLE,          "GFP_MOVABLE"}          \
-        ) : "GFP_NOWAIT"
+#include "gfpflags.h"
 
 DECLARE_EVENT_CLASS(kmem_alloc,