netdev - Re: [PATCH net] Revert "udp: do rmem bulk free even if the rx sk queue is empty"

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Message-Id: <20200122.211001.959451019501750401.davem@davemloft.net>
Date:   Wed, 22 Jan 2020 21:10:01 +0100 (CET)
From:   David Miller <davem@...emloft.net>
To:     pabeni@...hat.com
Cc:     netdev@...r.kernel.org, willemdebruijn.kernel@...il.com
Subject: Re: [PATCH net] Revert "udp: do rmem bulk free even if the rx sk
 queue is empty"

From: Paolo Abeni <pabeni@...hat.com>
Date: Tue, 21 Jan 2020 16:50:49 +0100

> This reverts commit 0d4a6608f68c7532dcbfec2ea1150c9761767d03.
> 
> Williem reported that after commit 0d4a6608f68c ("udp: do rmem bulk
> free even if the rx sk queue is empty") the memory allocated by
> an almost idle system with many UDP sockets can grow a lot.
> 
> For stable kernel keep the solution as simple as possible and revert
> the offending commit.
> 
> Reported-by: Willem de Bruijn <willemdebruijn.kernel@...il.com>
> Diagnosed-by: Eric Dumazet <eric.dumazet@...il.com>
> Fixes: 0d4a6608f68c ("udp: do rmem bulk free even if the rx sk queue is empty")
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>

Applied and queued up for -stable.