Messages in this thread | | | Date | Mon, 30 Oct 2000 11:50:24 +0100 (CET) | From | Ingo Molnar <> | Subject | Re: 2.2.18Pre Lan Performance Rocks! |
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On Mon, 30 Oct 2000, Jeff V. Merkey wrote:
> ds: and es: are both used in copy-to-user and copy-from-user and they > get reloaded.
And they all share the same segment descriptor. Whats your point? ES is the default target segment for string operations. DS is the default data segment. Have you ever profiled how many cycles it takes to do a "mov __KERNEL_DS, %es" in entry.S, before making your (ridiculous) claim? I have.
Ingo
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