Re: Memory providers multiplexing (Was: [PATCH net-next v4 4/5] page_pool: remove PP_FLAG_PAGE_FRAG flag)
From: David Ahern <dsahern@kernel.org>
Date: 2023-07-03 17:23:59
Also in:
linux-mediatek, linux-rdma, linux-wireless, lkml, netdev
On 7/3/23 11:13 AM, Eric Dumazet wrote:
quoted hunk ↗ jump to hunk
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index a2dbeb264f260e5b8923ece9aac99fe19ddfeb62..aa4133d1b1e0676e408499ea4534b51262394432100644--- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c@@ -2152,7 +2152,7 @@ static int packet_rcv(struct sk_buff *skb,struct net_device *dev, } } - snaplen = skb->len; + snaplen = skb->devmem ? skb_headlen(skb) : skb->len;
Ok, so you expect a flag on the skb noting the use of 'untouchable' memory. That aligns with my expectations based on POCs. Based on the above: 1) skb->head is expected to be host memory, and 2) the flag is a global for all frags, so no mix and match. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel