Re: [PATCH] zerocopy NFS for 2.5.36

From: Pavel Machek (
Date: Sat Sep 21 2002 - 06:56:21 EST

> 1)
> This patch enables HW-checksum against outgoing packets including UDP frames.
> Can you explain the TCP parts? They look very wrong.
> It was discussed long ago that csum_and_copy_from_user() performs
> better than plain copy_from_user() on x86. I do not remember all
> details, but I do know that using copy_from_user() is not a real
> improvement at least on x86 architecture.

Well, if this is the case, we need to #define copy_from_user csum_and_copy_from_user :-).


I'm "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at
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