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Re: Assertions when lowering tcp_tso_win_divisor

To: Sridhar Samudrala <sri@xxxxxxxxxx>
Subject: Re: Assertions when lowering tcp_tso_win_divisor
From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxxxxx>
Date: Sat, 20 Nov 2004 22:44:39 -0200
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>, herbert@xxxxxxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <Pine.LNX.4.58.0411201503510.6242@w-sridhar.beaverton.ibm.com>
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Sridhar Samudrala wrote:
On Fri, 19 Nov 2004, David S. Miller wrote:


On Fri, 19 Nov 2004 18:00:21 -0800 (PST)
Sridhar Samudrala <sri@xxxxxxxxxx> wrote:


Unfortunately as we cannot upgrade to 2.6.10-rc2

This doesn't work. You cannot expect upstream maintainers to work with you if you're not willing to or able to try things out with the latest kernels.

I have an inkling as to the reason why you're restricted
in this way, which is that you're limited to some vendor's
kernel.  Am I right?


Yes. You are right. It is a vendor kernel based on 2.6.9 along
with some vendor specific kernel patches.
I agree that it is not always possible to support older kernels
and i was not expecting you to do that.
I tried to do this myself by identifying the tso related patches
that went in after 2.6.9 and just wanted to find out if i missed
any other patches that may have fixed the tso related assertions.

We will try to see if this problem can be reproduced with
2.6.10-rc2.

That will help figuring out the problem, even if afterwards you continue using 2.6.9, by determining if the problem was solved already 8) i.e. it may be another bug, not the tso related ones solved in 2.6.10-rc2.

- Arnaldo

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