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Date: Wed, 25 Feb 2026 17:43:54 -0800
From: Jakub Kicinski <kuba@kernel.org>
To: Leon Hwang <leon.huangfu@shopee.com>
Cc: netdev@vger.kernel.org, "David S . Miller" <davem@davemloft.net>, Eric
 Dumazet <edumazet@google.com>, Paolo Abeni <pabeni@redhat.com>, Simon
 Horman <horms@kernel.org>, Jonathan Corbet <corbet@lwn.net>, Shuah Khan
 <skhan@linuxfoundation.org>, David Ahern <dsahern@kernel.org>, Neal
 Cardwell <ncardwell@google.com>, Kuniyuki Iwashima <kuniyu@google.com>,
 Ilpo =?UTF-8?B?SsOkcnZpbmVu?= <ij@kernel.org>, Ido Schimmel
 <idosch@nvidia.com>, kerneljasonxing@gmail.com, lance.yang@linux.dev,
 jiayuan.chen@linux.dev, Leon Hwang <leon.hwang@linux.dev>,
 linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH net-next] tcp: Add net.ipv4.tcp_purge_receive_queue
 sysctl
Message-ID: <20260225174354.5a698ddb@kernel.org>
In-Reply-To: <20260225074633.149590-1-leon.huangfu@shopee.com>
References: <20260225074633.149590-1-leon.huangfu@shopee.com>
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On Wed, 25 Feb 2026 15:46:33 +0800 Leon Hwang wrote:
> Issue:
> When a TCP socket in the CLOSE_WAIT state receives a RST packet, the
> current implementation does not clear the socket's receive queue. This
> causes SKBs in the queue to remain allocated until the socket is
> explicitly closed by the application. As a consequence:
> 
> 1. The page pool pages held by these SKBs are not released.

On what kernel version and driver are you observing this?