Well... relying on MTRRs is a big cost in complexity and failure modes. Tejun Heo <t...@kernel.org> wrote: >Hello, > >On Fri, Aug 23, 2013 at 03:08:55PM +0200, H. Peter Anvin wrote: >> What is the point of 1G+MTRR? If there are caching differences the >> TLB will fracture the pages anyway. > >Ah, right. Consuming less memory / cachelines would still be a small >advantage tho unless creating split TLB from larger mapping is >noticeably less efficient. If the extra logic to do that is small, >which I think it'd be, it'd be a gain at almost no cost. > >Thanks.
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