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authorMiaohe Lin2021-11-05 13:40:08 -0700
committerLinus Torvalds2021-11-06 13:30:37 -0700
commit7cba630bd830472f88ada5fdd34bbfd5825d9217 (patch)
tree6ebaf69e647b2efa85e022b2fc4e9ece3eefa4dd
parentff7ed9e4532d14e0478d192548e77d78d72387e9 (diff)
mm/page_alloc.c: fix obsolete comment in free_pcppages_bulk()
The second two paragraphs about "all pages pinned" and pages_scanned is obsolete.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. Link: https://lkml.kernel.org/r/20210902121242.41607-4-linmiaohe@huawei.com Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Acked-by: Mel Gorman <mgorman@techsingularity.net> Cc: David Hildenbrand <david@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/page_alloc.c8
1 files changed, 1 insertions, 7 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8224c6c302dd..c494c9c66f4f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1428,14 +1428,8 @@ 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)