On 8/3/22 04:51, Abel Wu wrote: > It seems unnecessary to search pages with order < alloc_order in > fallback allocation. This can currently happen with ALLOC_NOFRAGMENT and alloc_order > pageblock_order, so add a test to prevent it. > Signed-off-by: Abel Wu <wuyun.abel@xxxxxxxxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx> > --- > mm/page_alloc.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > index e008a3df0485..0abafc2fc3e0 100644 > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -2934,7 +2934,7 @@ __rmqueue_fallback(struct zone *zone, int order, int start_migratetype, > * i.e. orders < pageblock_order. If there are no local zones free, > * the zonelists will be reiterated without ALLOC_NOFRAGMENT. > */ > - if (alloc_flags & ALLOC_NOFRAGMENT) > + if (order < pageblock_order && alloc_flags & ALLOC_NOFRAGMENT) > min_order = pageblock_order; > > /*
