[PATCH] zerocopy NFS updated

From: Hirokazu Takahashi (taka@valinux.co.jp)
Date: Wed Apr 10 2002 - 05:05:50 EST


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



Andrew, Could you try it again?

Hirokazu Takahashi
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

This archive was generated by hypermail 2b29 : Mon Apr 15 2002 - 22:00:15 EST