diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/skbuff.h | 61 |
1 files changed, 33 insertions, 28 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 103fbe8113f8..73c370e615de 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2185,46 +2185,51 @@ static inline struct sk_buff *netdev_alloc_skb_ip_align(struct net_device *dev, } /** - * __skb_alloc_pages - allocate pages for ps-rx on a skb and preserve pfmemalloc data - * @gfp_mask: alloc_pages_node mask. Set __GFP_NOMEMALLOC if not for network packet RX - * @skb: skb to set pfmemalloc on if __GFP_MEMALLOC is used - * @order: size of the allocation + * __dev_alloc_pages - allocate page for network Rx + * @gfp_mask: allocation priority. Set __GFP_NOMEMALLOC if not for network Rx + * @order: size of the allocation * - * Allocate a new page. + * Allocate a new page. * - * %NULL is returned if there is no free memory. + * %NULL is returned if there is no free memory. */ -static inline struct page *__skb_alloc_pages(gfp_t gfp_mask, - struct sk_buff *skb, - unsigned int order) -{ - struct page *page; - - gfp_mask |= __GFP_COLD; - - if (!(gfp_mask & __GFP_NOMEMALLOC)) - gfp_mask |= __GFP_MEMALLOC; +static inline struct page *__dev_alloc_pages(gfp_t gfp_mask, + unsigned int order) +{ + /* This piece of code contains several assumptions. + * 1. This is for device Rx, therefor a cold page is preferred. + * 2. The expectation is the user wants a compound page. + * 3. If requesting a order 0 page it will not be compound + * due to the check to see if order has a value in prep_new_page + * 4. __GFP_MEMALLOC is ignored if __GFP_NOMEMALLOC is set due to + * code in gfp_to_alloc_flags that should be enforcing this. + */ + gfp_mask |= __GFP_COLD | __GFP_COMP | __GFP_MEMALLOC; - page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, order); - if (skb && page && page->pfmemalloc) - skb->pfmemalloc = true; + return alloc_pages_node(NUMA_NO_NODE, gfp_mask, order); +} - return page; +static inline struct page *dev_alloc_pages(unsigned int order) +{ + return __dev_alloc_pages(GFP_ATOMIC, order); } /** - * __skb_alloc_page - allocate a page for ps-rx for a given skb and preserve pfmemalloc data - * @gfp_mask: alloc_pages_node mask. Set __GFP_NOMEMALLOC if not for network packet RX - * @skb: skb to set pfmemalloc on if __GFP_MEMALLOC is used + * __dev_alloc_page - allocate a page for network Rx + * @gfp_mask: allocation priority. Set __GFP_NOMEMALLOC if not for network Rx * - * Allocate a new page. + * Allocate a new page. * - * %NULL is returned if there is no free memory. + * %NULL is returned if there is no free memory. */ -static inline struct page *__skb_alloc_page(gfp_t gfp_mask, - struct sk_buff *skb) +static inline struct page *__dev_alloc_page(gfp_t gfp_mask) +{ + return __dev_alloc_pages(gfp_mask, 0); +} + +static inline struct page *dev_alloc_page(void) { - return __skb_alloc_pages(gfp_mask, skb, 0); + return __dev_alloc_page(GFP_ATOMIC); } /** |
