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author | 2016-04-11 10:41:07 +0300 | |
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committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/mm/page_isolation.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/mm/page_isolation.c')
-rw-r--r-- | kernel/mm/page_isolation.c | 35 |
1 files changed, 9 insertions, 26 deletions
diff --git a/kernel/mm/page_isolation.c b/kernel/mm/page_isolation.c index 303c90879..4568fd58f 100644 --- a/kernel/mm/page_isolation.c +++ b/kernel/mm/page_isolation.c @@ -9,7 +9,8 @@ #include <linux/hugetlb.h> #include "internal.h" -int set_migratetype_isolate(struct page *page, bool skip_hwpoisoned_pages) +static int set_migratetype_isolate(struct page *page, + bool skip_hwpoisoned_pages) { struct zone *zone; unsigned long flags, pfn; @@ -72,7 +73,7 @@ out: return ret; } -void unset_migratetype_isolate(struct page *page, unsigned migratetype) +static void unset_migratetype_isolate(struct page *page, unsigned migratetype) { struct zone *zone; unsigned long flags, nr_pages; @@ -223,34 +224,16 @@ __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; } |