netdev - Re: [PATCH] sctp: Do not account for sizeof(struct sk

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Message-Id: <20111219.151004.851224380823448122.davem@davemloft.net>
Date:	Mon, 19 Dec 2011 15:10:04 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	tgraf@...hat.com
Cc:	vladislav.yasevich@...com, linux-sctp@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH] sctp: Do not account for sizeof(struct sk_buff) in
 estimated rwnd

From: Thomas Graf <tgraf@...hat.com>
Date: Mon, 19 Dec 2011 15:11:40 +0100

> When checking whether a DATA chunk fits into the estimated rwnd a
> full sizeof(struct sk_buff) is added to the needed chunk size. This
> quickly exhausts the available rwnd space and leads to packets being
> sent which are much below the PMTU limit. This can lead to much worse
> performance.
 ...

Vlad, please review this.

Thanks.
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