Re: [PATCH] zerocopy NFS for 2.5.36
Pavel Machek (pavel@elf.ucw.cz)
Sat, 21 Sep 2002 13:56:21 +0200
Hi!
>
> 1)
> ftp://ftp.valinux.co.jp/pub/people/taka/2.5.36/va10-hwchecksum-2.5.36.patch
> 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 :-).
Pavel
--
I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org
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