We want to limit the use of page_mapcount() to the places where it is absolutely necessary. We already trace raw page->refcount, raw page->flags and raw page->mapping, and don't involve any folios. Let's also trace the raw mapcount value that does not consider the entire mapcount of large folios, and we don't add "1" to it. When dealing with typed folios, this makes a lot more sense. ... and it's for debugging purposes only either way. Signed-off-by: David Hildenbrand <david@xxxxxxxxxx> --- include/trace/events/page_ref.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/trace/events/page_ref.h b/include/trace/events/page_ref.h index 8a99c1cd417b..fe33a255b7d0 100644 --- a/include/trace/events/page_ref.h +++ b/include/trace/events/page_ref.h @@ -30,7 +30,7 @@ DECLARE_EVENT_CLASS(page_ref_mod_template, __entry->pfn = page_to_pfn(page); __entry->flags = page->flags; __entry->count = page_ref_count(page); - __entry->mapcount = page_mapcount(page); + __entry->mapcount = atomic_read(&page->_mapcount); __entry->mapping = page->mapping; __entry->mt = get_pageblock_migratetype(page); __entry->val = v; @@ -79,7 +79,7 @@ DECLARE_EVENT_CLASS(page_ref_mod_and_test_template, __entry->pfn = page_to_pfn(page); __entry->flags = page->flags; __entry->count = page_ref_count(page); - __entry->mapcount = page_mapcount(page); + __entry->mapcount = atomic_read(&page->_mapcount); __entry->mapping = page->mapping; __entry->mt = get_pageblock_migratetype(page); __entry->val = v; -- 2.44.0
