From: Pavel Machek <pavel@elf.ucw.cz>
To: "David S. Miller" <davem@redhat.com>
Cc: taka@valinux.co.jp, neilb@cse.unsw.edu.au,
linux-kernel@vger.kernel.org, nfs@lists.sourceforge.net
Subject: Re: [PATCH] zerocopy NFS for 2.5.36
Date: Sat, 21 Sep 2002 13:56:21 +0200 [thread overview]
Message-ID: <20020921115619.GA1000@elf.ucw.cz> (raw)
In-Reply-To: <20020918.160057.17194839.davem@redhat.com>
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
next prev parent reply other threads:[~2002-09-21 11:51 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-18 8:14 Hirokazu Takahashi
2002-09-18 23:00 ` David S. Miller
2002-09-18 23:54 ` Alan Cox
2002-09-19 0:16 ` Andrew Morton
2002-09-19 2:13 ` Aaron Lehmann
2002-09-19 3:30 ` Andrew Morton
2002-09-19 10:42 ` Alan Cox
2002-09-19 13:15 ` [NFS] " Hirokazu Takahashi
2002-09-19 20:42 ` Andrew Morton
2002-09-19 21:12 ` David S. Miller
2002-09-21 11:56 ` Pavel Machek [this message]
2002-10-14 5:50 ` Neil Brown
2002-10-14 6:15 ` David S. Miller
2002-10-14 10:45 ` kuznet
2002-10-14 10:48 ` David S. Miller
2002-10-14 12:01 ` Hirokazu Takahashi
2002-10-14 14:12 ` Andrew Theurer
2002-10-16 3:44 ` Neil Brown
2002-10-16 4:31 ` David S. Miller
2002-10-16 15:04 ` Andrew Theurer
2002-10-17 2:03 ` [NFS] " Andrew Theurer
2002-10-17 2:31 ` Hirokazu Takahashi
2002-10-17 13:16 ` Andrew Theurer
2002-10-17 13:26 ` Hirokazu Takahashi
2002-10-17 14:10 ` Andrew Theurer
2002-10-17 16:26 ` Hirokazu Takahashi
2002-10-18 5:38 ` Trond Myklebust
2002-10-18 7:19 ` Hirokazu Takahashi
2002-10-18 15:12 ` Andrew Theurer
2002-10-19 20:34 ` Hirokazu Takahashi
2002-10-22 21:16 ` Andrew Theurer
2002-10-23 9:29 ` Hirokazu Takahashi
2002-10-24 15:32 ` Andrew Theurer
2002-10-16 11:09 ` Hirokazu Takahashi
2002-10-16 17:02 ` kaza
2002-10-17 4:36 ` rddunlap
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