netdev - Re: [PATCH RFC] net: decrease the length of backlog queue immediately after it's detached from sk

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Message-ID: <56FBCCF6.80203@cogentembedded.com>
Date:	Wed, 30 Mar 2016 15:56:22 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Yang Yingliang <yangyingliang@...wei.com>, netdev@...r.kernel.org
Cc:	davem@...emloft.net, eric.dumazet@...il.com
Subject: Re: [PATCH RFC] net: decrease the length of backlog queue immediately
 after it's detached from sk

Hello.

On 3/30/2016 8:16 AM, Yang Yingliang wrote:

> When task A hold the sk owned in tcp_sendmsg, if lots of packets
> arrive and the packets will be added to backlog queue. The packets
> will be handled in release_sock called from tcp_sendmsg. When the
> sk_backlog is removed from sk, the length will not decrease until
> all the packets in backlog queue are handled. This may leads to the
> new packets be dropped because the lenth is too big. So set the
> lenth to 0 immediately after it's detached from sk.

    Length?

> Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
[...]

MBR, Sergei