linux-kernel - Re: [PATCH net-next] tcp: replace LINUX_MIB_TCPOFODROP with LINUX_MIB_TCPRMEMFULLDROP for drops due to receive buffer full

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Date:   Wed, 27 Jun 2018 08:27:22 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Yafang Shao <laoar.shao@...il.com>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        David Miller <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next] tcp: replace LINUX_MIB_TCPOFODROP with
 LINUX_MIB_TCPRMEMFULLDROP for drops due to receive buffer full



On 06/27/2018 08:14 AM, Yafang Shao wrote:
 
> Got it!
> 
> What about introduce a new counter, i.e. TCPRcvQFullDrop ?

tcp_try_rmem_schedule() can fail for many different reasons,
not related to how occupied the socket receive queue is.