Re: 2.6.30-rc deadline scheduler performance regression for iozone over NFS

[Andrew Morton]

On Wed, 13 May 2009 12:20:57 -0400 Olga Kornievskaia <aglo@xxxxxxxxxxxxxx> wrote:

> I believe what you are seeing is how well TCP autotuning performs.
> What old NFS code was doing is disabling autotuning and instead using
> #nfsd thread to scale TCP recv window. You are providing an example of
> where setting TCP buffer sizes outperforms TCP autotuning. While this
> is a valid example, there is also an alternative example of where old
> NFS design hurts performance.

<scratches head>

Jeff's computer got slower.  Can we fix that?
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