From: Hirokazu Takahashi <taka@valinux.co.jp>
Subject: Re: Re: [PATCH] zerocopy NFS for 2.5.43
Date: Thu, 24 Oct 2002 07:35:10 +0900 (JST)
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Hello,

> > > > Also, I am wondering about the way that you put zero-copy support into
> > > > nfsd_readdir.

> I think I would change the approach to buffering.
> Instead of having a fixed set of pages, we just allocate new pages as
> needed, having handed old ones over to the networking layer.
> 
> So we have a pool of pages that we draw from when generating replies,
> and refill before accepting a new request.

We can also put RPC/NFS headers on pages and send them without copy.
This seems good for NFSv4 COMPOUNDS.

> Ofcourse that is a fairly big change from where we are now so it might
> take a while.  We should probably get zero copy reads in first...

Yes.


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