netdev - Re: [PATCH net] mlx4: reduce OOM risk on arches with large pages

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Message-Id: <20170220.103202.2232789170855833380.davem@davemloft.net>
Date:   Mon, 20 Feb 2017 10:32:02 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     eric.dumazet@...il.com
Cc:     netdev@...r.kernel.org, tariqt@...lanox.com, saeedm@...lanox.com
Subject: Re: [PATCH net] mlx4: reduce OOM risk on arches with large pages

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Sat, 18 Feb 2017 10:34:18 -0800

> From: Eric Dumazet <edumazet@...gle.com>
> 
> Since mlx4 NIC are used on PowerPC with 64K pages, we need to adapt
> MLX4_EN_ALLOC_PREFER_ORDER definition.
> 
> Otherwise, a fragment sitting in an out of order TCP queue can hold
> 0.5 Mbytes and it is a serious OOM risk.
> 
> Fixes: 51151a16a60f ("mlx4: allow order-0 memory allocations in RX path")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied.