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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>
This commit is contained in:
zhong jiang 2016-07-28 15:45:07 -07:00 committed by Linus Torvalds
parent 091f362c53
commit 400bc7fd4f
1 changed files with 4 additions and 1 deletions
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5
mm/page_alloc.c
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@ -2517,7 +2517,10 @@ int __isolate_free_page(struct page *page, unsigned int order)
zone->free_area[order].nr_free--; zone->free_area[order].nr_free--;
rmv_page_order(page); 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) { if (order >= pageblock_order - 1) {
struct page *endpage = page + (1 << order) - 1; struct page *endpage = page + (1 << order) - 1;
for (; page < endpage; page += pageblock_nr_pages) { for (; page < endpage; page += pageblock_nr_pages) {