Re: [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1

[Ingo Molnar]

On Wed, 10 Jan 2001, Manfred Spraul wrote:

> That means sendmsg() changes the page tables? I measures
> smp_call_function on my Dual Pentium 350, and it took around 1950 cpu
> ticks.

well, this is a performance problem if you are using threads. For normal
processes there is no need for a SMP cross-call, there TLB flushes are
local only.

        Ingo

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