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Re: Assertions when lowering tcp_tso_win_divisor

To: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Subject: Re: Assertions when lowering tcp_tso_win_divisor
From: "David S. Miller" <davem@xxxxxxxxxxxxx>
Date: Tue, 16 Nov 2004 16:31:06 -0800
Cc: sri@xxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <E1CUAQ2-0002jT-00@xxxxxxxxxxxxxxxxxxxxxxxx>
References: <Pine.LNX.4.58.0411160931080.31882@xxxxxxxxxxxxxxxxxxxxxxxxxxx> <E1CUAQ2-0002jT-00@xxxxxxxxxxxxxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
On Wed, 17 Nov 2004 07:59:18 +1100
Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote:

> Sridhar Samudrala <sri@xxxxxxxxxx> wrote:
> > We are seeing following assertions when running specweb99 with
> > tcp_tso_win_divisor lowered to 4, 2 or 1 on linux 2.6.9 based kernels.
> 2.6.9 is known to have bugs in TCP book-keeping.  Please try 2.6.10-rc2
> instead.

Actually, that's true.  I missed that this report was against
2.6.9 vanilla, TCP is buggy as can be wrt TSO in that

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