diff options
| -rw-r--r-- | include/linux/skbuff.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 0336f02e3667..b814bb8fd5ab 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1247,6 +1247,17 @@ static inline void __skb_fill_page_desc(struct sk_buff *skb, int i, { skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; + /* + * Propagate page->pfmemalloc to the skb if we can. The problem is + * that not all callers have unique ownership of the page. If + * pfmemalloc is set, we check the mapping as a mapping implies + * page->index is set (index and pfmemalloc share space). + * If it's a valid mapping, we cannot use page->pfmemalloc but we + * do not lose pfmemalloc information as the pages would not be + * allocated using __GFP_MEMALLOC. + */ + if (page->pfmemalloc && !page->mapping) + skb->pfmemalloc = true; frag->page.p = page; frag->page_offset = off; skb_frag_size_set(frag, size); |