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    SubjectRe: [PATCH 02/25] Do not sanity check order in the fast path
    Date
    > @@ -182,9 +182,6 @@ __alloc_pages(gfp_t gfp_mask, unsigned int order,
    > static inline struct page *alloc_pages_node(int nid, gfp_t gfp_mask,
    > unsigned int order)
    > {
    > - if (unlikely(order >= MAX_ORDER))
    > - return NULL;
    > -
    > /* Unknown node is current node */
    > if (nid < 0)
    > nid = numa_node_id();
    > @@ -198,9 +195,6 @@ extern struct page *alloc_pages_current(gfp_t gfp_mask, unsigned order);
    > static inline struct page *
    > alloc_pages(gfp_t gfp_mask, unsigned int order)
    > {
    > - if (unlikely(order >= MAX_ORDER))
    > - return NULL;
    > -
    > return alloc_pages_current(gfp_mask, order);
    > }
    > extern struct page *alloc_page_vma(gfp_t gfp_mask,
    > diff --git a/mm/page_alloc.c b/mm/page_alloc.c
    > index dcc4f05..5028f40 100644
    > --- a/mm/page_alloc.c
    > +++ b/mm/page_alloc.c
    > @@ -1405,6 +1405,8 @@ get_page_from_freelist(gfp_t gfp_mask, nodemask_t *nodemask, unsigned int order,
    >
    > classzone_idx = zone_idx(preferred_zone);
    >
    > + VM_BUG_ON(order >= MAX_ORDER);
    > +

    Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>






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