Messages in this thread | | | Date | Wed, 10 Jan 2001 20:33:16 -0800 | From | "David S. Miller" <> | Subject | Re: Updated zerocopy patch up on kernel.org |
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Date: Thu, 11 Jan 2001 11:41:30 +0100 (CET) From: Ingo Molnar <mingo@elte.hu>
On Tue, 9 Jan 2001, David S. Miller wrote:
> I'm actually considering making the SG w/o hwcsum situation illegal.
i believe it might still make some limited sense for normal sendmsg() and higher MTUs (or 8k NFS) - we could copy & checksum stuff into the ->tcp_page if SG is possible and thus the SG capability improves the VM. (because we can allocate at PAGE_SIZE granularity.)
Basically what your advocating for is to take advantage of SG-only devices when we have full control of the page contents.
Sure this would work.
But honestly the real gain from SG-only devices would be (as you know) the memory usage savings when sending a single static file object to several thousand clients.
Later, David S. Miller davem@redhat.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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