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authorzhong jiang <zhongjiang@huawei.com>2016-07-29 01:45:07 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-29 02:07:41 +0300
commit400bc7fd4fa7d33c96d836e6b65eeed246f1959a (patch)
treea86dc157557715af3cfe61f98a1c8863e9633052
parent091f362c53c24ca9751727a699d63e50528c306b (diff)
downloadlinux-400bc7fd4fa7d33c96d836e6b65eeed246f1959a.tar.xz
mm: update the comment in __isolate_free_page
We need to assure the comment is consistent with the code. [akpm@linux-foundation.org: coding-style fixes] Link: http://lkml.kernel.org/r/1466171914-21027-1-git-send-email-zhongjiang@huawei.com Signed-off-by: zhong jiang <zhongjiang@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-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) {