mm-tracepoint: rename page-free events

Rename mm_page_free_direct into mm_page_free and mm_pagevec_free into
mm_page_free_batched

Since v2.6.33-5426-gc475dab the kernel triggers mm_page_free_direct for
all freed pages, not only for directly freed.  So, let's name it properly.
 For pages freed via page-list we also trigger mm_page_free_batched event.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 16 insertions, 16 deletions

diff --git a/Documentation/trace/events-kmem.txt b/Documentation/trace/events-kmem.txt
index aa82ee4a5a8..19480041006 100644
--- a/Documentation/trace/events-kmem.txt
+++ b/Documentation/trace/events-kmem.txt
@@ -40,8 +40,8 @@ but the call_site can usually be used to extrapolate that information.
 ==================
 mm_page_alloc             page=%p pfn=%lu order=%d migratetype=%d gfp_flags=%s
 mm_page_alloc_zone_locked page=%p pfn=%lu order=%u migratetype=%d cpu=%d percpu_refill=%d
-mm_page_free_direct       page=%p pfn=%lu order=%d
-mm_pagevec_free           page=%p pfn=%lu order=%d cold=%d
+mm_page_free              page=%p pfn=%lu order=%d
+mm_page_free_batched      page=%p pfn=%lu order=%d cold=%d
 
 These four events deal with page allocation and freeing. mm_page_alloc is
 a simple indicator of page allocator activity. Pages may be allocated from
@@ -53,13 +53,13 @@ amounts of activity imply high activity on the zone->lock. Taking this lock
 impairs performance by disabling interrupts, dirtying cache lines between
 CPUs and serialising many CPUs.
 
-When a page is freed directly by the caller, the mm_page_free_direct event
+When a page is freed directly by the caller, the only mm_page_free event
 is triggered. Significant amounts of activity here could indicate that the
 callers should be batching their activities.
 
-When pages are freed using a pagevec, the mm_pagevec_free is
-triggered. Broadly speaking, pages are taken off the LRU lock in bulk and
-freed in batch with a pagevec. Significant amounts of activity here could
+When pages are freed in batch, the also mm_page_free_batched is triggered.
+Broadly speaking, pages are taken off the LRU lock in bulk and
+freed in batch with a page list. Significant amounts of activity here could
 indicate that the system is under memory pressure and can also indicate
 contention on the zone->lru_lock.
 
diff --git a/Documentation/trace/postprocess/trace-pagealloc-postprocess.pl b/Documentation/trace/postprocess/trace-pagealloc-postprocess.pl
index 7df50e8cf4d..0a120aae33c 100644
--- a/Documentation/trace/postprocess/trace-pagealloc-postprocess.pl
+++ b/Documentation/trace/postprocess/trace-pagealloc-postprocess.pl
@@ -17,8 +17,8 @@ use Getopt::Long;
 
 # Tracepoint events
 use constant MM_PAGE_ALLOC              => 1;
-use constant MM_PAGE_FREE_DIRECT        => 2;
-use constant MM_PAGEVEC_FREE            => 3;
+use constant MM_PAGE_FREE               => 2;
+use constant MM_PAGE_FREE_BATCHED       => 3;
 use constant MM_PAGE_PCPU_DRAIN         => 4;
 use constant MM_PAGE_ALLOC_ZONE_LOCKED  => 5;
 use constant MM_PAGE_ALLOC_EXTFRAG      => 6;
@@ -223,10 +223,10 @@ EVENT_PROCESS:
                 # Perl Switch() sucks majorly
                 if ($tracepoint eq "mm_page_alloc") {
                         $perprocesspid{$process_pid}->{MM_PAGE_ALLOC}++;
-                } elsif ($tracepoint eq "mm_page_free_direct") {
-                        $perprocesspid{$process_pid}->{MM_PAGE_FREE_DIRECT}++;
-                } elsif ($tracepoint eq "mm_pagevec_free") {
-                        $perprocesspid{$process_pid}->{MM_PAGEVEC_FREE}++;
+                } elsif ($tracepoint eq "mm_page_free") {
+                        $perprocesspid{$process_pid}->{MM_PAGE_FREE}++
+                } elsif ($tracepoint eq "mm_page_free_batched") {
+                        $perprocesspid{$process_pid}->{MM_PAGE_FREE_BATCHED}++;
                 } elsif ($tracepoint eq "mm_page_pcpu_drain") {
                         $perprocesspid{$process_pid}->{MM_PAGE_PCPU_DRAIN}++;
                         $perprocesspid{$process_pid}->{STATE_PCPU_PAGES_DRAINED}++;
@@ -336,8 +336,8 @@ sub dump_stats {
                         $process_pid,
                         $stats{$process_pid}->{MM_PAGE_ALLOC},
                         $stats{$process_pid}->{MM_PAGE_ALLOC_ZONE_LOCKED},
-                        $stats{$process_pid}->{MM_PAGE_FREE_DIRECT},
-                        $stats{$process_pid}->{MM_PAGEVEC_FREE},
+                        $stats{$process_pid}->{MM_PAGE_FREE},
+                        $stats{$process_pid}->{MM_PAGE_FREE_BATCHED},
                         $stats{$process_pid}->{MM_PAGE_PCPU_DRAIN},
                         $stats{$process_pid}->{HIGH_PCPU_DRAINS},
                         $stats{$process_pid}->{HIGH_PCPU_REFILLS},
@@ -364,8 +364,8 @@ sub aggregate_perprocesspid() {
 
                 $perprocess{$process}->{MM_PAGE_ALLOC} += $perprocesspid{$process_pid}->{MM_PAGE_ALLOC};
                 $perprocess{$process}->{MM_PAGE_ALLOC_ZONE_LOCKED} += $perprocesspid{$process_pid}->{MM_PAGE_ALLOC_ZONE_LOCKED};
-                $perprocess{$process}->{MM_PAGE_FREE_DIRECT} += $perprocesspid{$process_pid}->{MM_PAGE_FREE_DIRECT};
-                $perprocess{$process}->{MM_PAGEVEC_FREE} += $perprocesspid{$process_pid}->{MM_PAGEVEC_FREE};
+                $perprocess{$process}->{MM_PAGE_FREE} += $perprocesspid{$process_pid}->{MM_PAGE_FREE};
+                $perprocess{$process}->{MM_PAGE_FREE_BATCHED} += $perprocesspid{$process_pid}->{MM_PAGE_FREE_BATCHED};
                 $perprocess{$process}->{MM_PAGE_PCPU_DRAIN} += $perprocesspid{$process_pid}->{MM_PAGE_PCPU_DRAIN};
                 $perprocess{$process}->{HIGH_PCPU_DRAINS} += $perprocesspid{$process_pid}->{HIGH_PCPU_DRAINS};
                 $perprocess{$process}->{HIGH_PCPU_REFILLS} += $perprocesspid{$process_pid}->{HIGH_PCPU_REFILLS};