netdev - Re: RFC: Nagle latency tuning

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Message-Id: <20080922.040912.193700258.davem@davemloft.net>
Date:	Mon, 22 Sep 2008 04:09:12 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	csnook@...hat.com
Cc:	andi@...stfloor.org, rick.jones2@...com, netdev@...r.kernel.org
Subject: Re: RFC: Nagle latency tuning

From: David Miller <davem@...emloft.net>
Date: Mon, 22 Sep 2008 03:49:33 -0700 (PDT)

> I'll try to figure out why Andi's patch doesn't behave as expected.

Andi's patch uses proc_dointvec_jiffies, which is for sysctl values
stored as seconds, whereas these things are used to record values with
smaller granulatiry, are stored in jiffies, and that's why we get zero
on read and writes have crazy effects.

Also, as Andi stated, this is not the way to deal with this problem.

So we have a broken patch, which even if implemented properly isn't the
way forward, so I consider this discussion dead in the water until we
have some test cases.

Don't you think? :-)
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