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Date: Mon, 29 Jan 2018 11:31:42 +0800 From: Jason Wang <jasowang@...hat.com> To: Cong Wang <xiyou.wangcong@...il.com> Cc: Linux Kernel Network Developers <netdev@...r.kernel.org>, John Fastabend <john.fastabend@...il.com>, "Michael S. Tsirkin" <mst@...hat.com> Subject: Re: [Patch net-next v3 3/3] net_sched: implement ->change_tx_queue_len() for pfifo_fast On 2018年01月26日 12:01, Cong Wang wrote: >> Is __skb_array_empty() in pfifo_fast_dequeue() still safe after this change? > Yes, we sync with dequeue path before calling ->change_tx_queue_len(). > I already mentioned this in patch 2/3. Aha, ok, I think I get the synchronize_net() trick in dev_deactivate_many(). Thanks
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