mm: update the comment in __isolate_free_page
We need to assure the comment is consistent with the code.
[[email protected]: coding-style fixes]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: zhong jiang <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 452513b..b6d38b1 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2517,7 +2517,10 @@
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) {
