linux-kernel - Re: Regression associated with commit c8628155ece3

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Message-Id: <20120821.212639.516363749620870558.davem@davemloft.net>
Date:	Tue, 21 Aug 2012 21:26:39 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	Larry.Finger@...inger.net
Cc:	eric.dumazet@...il.com, ncardwell@...gle.com,
	linville@...driver.com, linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Regression associated with commit c8628155ece3 - "tcp: reduce
 out_of_order memory use"

From: Larry Finger <Larry.Finger@...inger.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.
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