Re: [PATCH v5 6/7] x86/tlb: optimizing flush_tlb_mm

From: Borislav Petkov
Date: Tue May 15 2012 - 10:05:16 EST

On Tue, May 15, 2012 at 09:39:05AM -0400, Steven Rostedt wrote:
> > But you have to weight that against the cost of re-population, and
> > that's the difficult bit, since we have no clue how many tlb entries are
> > in use by the current cr3.
> >
> > It might be possible for intel to give us this information, I've asked
> > for something similar for cachelines.
> What information? The # of tlb entries in use?

... by the current %cr3, yes.

And also, before we delve into details, we still don't have a
representative benchmark where this shows any improvement.


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