Date: Tue, 21 Aug 2012 21:26:39 -0700 (PDT)
Message-Id: <20120821.212639.516363749620870558.davem@davemloft.net>
To: Larry.Finger@lwfinger.net
Cc: eric.dumazet@gmail.com, ncardwell@google.com, linville@tuxdriver.com,
        linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Regression associated with commit c8628155ece3 - "tcp: reduce
 out_of_order memory use"
From: David Miller <davem@davemloft.net>
In-Reply-To: <50345B12.1050600@lwfinger.net>
References: <50345B12.1050600@lwfinger.net>
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 721
Lines: 16

From: Larry Finger <Larry.Finger@lwfinger.net>
Date: Tue, 21 Aug 2012 23:07:46 -0500

> I find it hard to understand why this patch should cause these
> effects; however, I have verified that a kernel generated from "git
> checkout e86b2919" works fine. This commit is immediately before the
> patch in question.

I can guarentee it's improper skb->truesize setting in these drivers,
or use of too huge buffer sizes compared to the amount of data
contained within the packet.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/