[PATCH v2 3/5] mm/page_alloc.c: fix obsolete comment in free_pcppages_bulk()

Miaohe Lin
2021-09-02T12:12:36Z

The second two paragraphs about "all pages pinned" and pages_scanned is
obsolete. And There are PAGE_ALLOC_COSTLY_ORDER + 1 + NR_PCP_THP orders
in pcp. So the same order assumption is not held now.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
mm/page_alloc.c | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d3983244f56f..f7fcbac2d091 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1426,14 +1426,8 @@ static inline void prefetch_buddy(struct page *page)

/*
* Frees a number of pages from the PCP lists
- * Assumes all pages on list are in same zone, and of same order.
+ * Assumes all pages on list are in same zone.
* count is the number of pages to free.
- *
- * If the zone was previously in an "all pages pinned" state then look to
- * see if this freeing clears that state.
- *
- * And clear the zone's pages_scanned counter, to hold off the "all pages are
- * pinned" detection logic.
*/
static void free_pcppages_bulk(struct zone *zone, int count,
struct per_cpu_pages *pcp)
--
2.23.0