From: Hirokazu Takahashi Subject: [PATCH] zerocopy NFS updated Date: Wed, 10 Apr 2002 19:05:50 +0900 (JST) Sender: nfs-admin@lists.sourceforge.net Message-ID: <20020410.190550.83626375.taka@valinux.co.jp> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Cc: linux-kernel@vger.kernel.org Return-path: Received: from sv1.valinux.co.jp ([202.221.173.100]) by usw-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id 16vEz7-0005cr-00 for ; Wed, 10 Apr 2002 03:05:50 -0700 To: nfs@lists.sourceforge.net Errors-To: nfs-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Unsubscribe: , List-Archive: Hi I add a new patch for zerocopy NFS. va03-knfsd-zerocopy-sendpage-2.5.7-test1.patch makes knfsd to skip csum_partial_copy_generic() which copies data into a sk_buff. This feature works on when you use NFS over TCP only at this moment. I'd like to implement sendpage for UDP, but it doesn't work yet. But I wonder about sendpage. I guess HW IP checksum for outgoing pages might be miscalculated as VFS can update them anytime. New feature like COW pagecache should be added to VM and they should be duplicated in this case. Is there anyone who could advise me about this. Following patches patches are against linux 2.5.7 ftp://ftp.valinux.co.jp/pub/people/taka/tune/2.5.7/va01-knfsd-zerocopy-vfsread-2.5.7.patch ftp://ftp.valinux.co.jp/pub/people/taka/tune/2.5.7/va02-kmap-multplepages-2.5.7.patch ftp://ftp.valinux.co.jp/pub/people/taka/tune/2.5.7/va03-knfsd-zerocopy-sendpage-2.5.7-test1.patch Andrew, Could you try it again? Regards, Hirokazu Takahashi _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs