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-rw-r--r--mm/page_alloc.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 452513bf02ce..b6d38b1c1cdb 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2517,7 +2517,10 @@ int __isolate_free_page(struct page *page, unsigned int order)
zone->free_area[order].nr_free--;
rmv_page_order(page);
- /* Set the pageblock if the isolated page is at least a pageblock */
+ /*
+ * Set the pageblock if the isolated page is at least half of a
+ * pageblock
+ */
if (order >= pageblock_order - 1) {
struct page *endpage = page + (1 << order) - 1;
for (; page < endpage; page += pageblock_nr_pages) {