diff options
| author |   Konstantin Khlebnikov <khlebnikov@openvz.org> | 2012-01-10 15:07:09 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-10 16:30:41 -0800 |
| commit | b413d48aa70605701c0b395b2e350ca15f5d643a (patch) | |
| tree | 6aa777c589eedfb9dc498f375d553e561e203506 /Documentation/trace/events-kmem.txt | |
| parent | mm: remove unused pagevec_free (diff) | |
| download | linux-dev-b413d48aa70605701c0b395b2e350ca15f5d643a.tar.xz linux-dev-b413d48aa70605701c0b395b2e350ca15f5d643a.zip | |
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>
Diffstat (limited to 'Documentation/trace/events-kmem.txt')
| -rw-r--r-- | Documentation/trace/events-kmem.txt | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/Documentation/trace/events-kmem.txt b/Documentation/trace/events-kmem.txt index aa82ee4a5a87..194800410061 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. |