From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alexei Starovoitov <ast@fb.com>
Subject: Re: [PATCH v3 net-next 6/7] net: do not block BH while processing
 socket backlog
Date: Fri, 29 Apr 2016 14:47:10 -0700
Message-ID: <5723D65E.1040806@fb.com>
References: <1461964613-4872-1-git-send-email-edumazet@google.com>
 <1461964613-4872-7-git-send-email-edumazet@google.com>
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Cc: netdev <netdev@vger.kernel.org>,
	Soheil Hassas Yeganeh <soheil@google.com>,
	Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>,
	Eric Dumazet <eric.dumazet@gmail.com>
To: Eric Dumazet <edumazet@google.com>,
	"David S . Miller" <davem@davemloft.net>
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On 4/29/16 2:16 PM, Eric Dumazet wrote:
> Socket backlog processing is a major latency source.
>
> With current TCP socket sk_rcvbuf limits, I have sampled __release_sock()
> holding cpu for more than 5 ms, and packets being dropped by the NIC
> once ring buffer is filled.
>
> All users are now ready to be called from process context,
> we can unblock BH and let interrupts be serviced faster.
>
> cond_resched_softirq() could be removed, as it has no more user.
>
> Signed-off-by: Eric Dumazet<edumazet@google.com>
> Acked-by: Soheil Hassas Yeganeh<soheil@google.com>

Acked-by: Alexei Starovoitov <ast@kernel.org>