On 02.12.20 13:21, Muchun Song wrote: > The max order page has no buddy page and never merge to other order. > So isolating and then freeing it is pointless. > > Signed-off-by: Muchun Song <[email protected]> > --- > mm/page_isolation.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/mm/page_isolation.c b/mm/page_isolation.c > index a254e1f370a3..bddf788f45bf 100644 > --- a/mm/page_isolation.c > +++ b/mm/page_isolation.c > @@ -88,7 +88,7 @@ static void unset_migratetype_isolate(struct page *page, > unsigned migratetype) > */ > if (PageBuddy(page)) { > order = buddy_order(page); > - if (order >= pageblock_order) { > + if (order >= pageblock_order && order < MAX_ORDER - 1) { > pfn = page_to_pfn(page); > buddy_pfn = __find_buddy_pfn(pfn, order); > buddy = page + (buddy_pfn - pfn); >
Reviewed-by: David Hildenbrand <[email protected]> -- Thanks, David / dhildenb
