diff options
Diffstat (limited to 'mm/page_isolation.c')
| -rw-r--r-- | mm/page_isolation.c | 30 |
1 files changed, 6 insertions, 24 deletions
diff --git a/mm/page_isolation.c b/mm/page_isolation.c index 303c908790ef..32fdc1df05e5 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -223,34 +223,16 @@ __test_page_isolated_in_pageblock(unsigned long pfn, unsigned long end_pfn, continue; } page = pfn_to_page(pfn); - if (PageBuddy(page)) { + if (PageBuddy(page)) /* - * If race between isolatation and allocation happens, - * some free pages could be in MIGRATE_MOVABLE list - * although pageblock's migratation type of the page - * is MIGRATE_ISOLATE. Catch it and move the page into - * MIGRATE_ISOLATE list. + * If the page is on a free list, it has to be on + * the correct MIGRATE_ISOLATE freelist. There is no + * simple way to verify that as VM_BUG_ON(), though. */ - if (get_freepage_migratetype(page) != MIGRATE_ISOLATE) { - struct page *end_page; - - end_page = page + (1 << page_order(page)) - 1; - move_freepages(page_zone(page), page, end_page, - MIGRATE_ISOLATE); - } pfn += 1 << page_order(page); - } - else if (page_count(page) == 0 && - get_freepage_migratetype(page) == MIGRATE_ISOLATE) - pfn += 1; - else if (skip_hwpoisoned_pages && PageHWPoison(page)) { - /* - * The HWPoisoned page may be not in buddy - * system, and page_count() is not 0. - */ + else if (skip_hwpoisoned_pages && PageHWPoison(page)) + /* A HWPoisoned page cannot be also PageBuddy */ pfn++; - continue; - } else break; } |