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SubjectRe: [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1
   Date: 	Wed, 10 Jan 2001 09:41:24 +0100
From: Manfred Spraul <>

That means sendmsg() changes the page tables?

Not in the zerocopy patch I am proposing and asking people to test. I
stated in another email that MSG_NOCOPY was considered experimental
and thus left out of my patches.

I measures smp_call_function on my Dual Pentium 350, and it took
around 1950 cpu ticks.

And this is one of several reasons why the MSG_NOCOPY facility is
considered experimental.

David S. Miller
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