skb_page_frag_refill currently permits only order-0 page allocs
unless GFP_WAIT is used. Change skb_page_frag_refill to attempt
higher-order page allocations whether or not GFP_WAIT is used. If
memory cannot be allocated, the allocator will fall back to
successively smaller page allocs (down to order-0 page allocs).
This change brings skb_page_frag_refill in line with the existing
page allocation strategy employed by netdev_alloc_frag, which attempts
higher-order page allocations whether or not GFP_WAIT is set, falling
back to successively lower-order page allocations on failure. Part
of migration of virtio-net to per-receive queue page frag allocators.
Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Acked-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Signed-off-by: Michael Dalton <mwdalton@xxxxxxxxxx>
---
net/core/sock.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/net/core/sock.c b/net/core/sock.c
index 85ad6f0..b3f7ee3 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1836,9 +1836,7 @@ bool skb_page_frag_refill(unsigned int sz, struct page_frag *pfrag, gfp_t prio)
put_page(pfrag->page);
}
- /* We restrict high order allocations to users that can afford to wait */
- order = (prio & __GFP_WAIT) ? SKB_FRAG_PAGE_ORDER : 0;
-
+ order = SKB_FRAG_PAGE_ORDER;
do {
gfp_t gfp = prio;
--
1.8.5.2
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