Re: please revert bogus patch to vmscan.c

Benjamin LaHaise (bcrl@redhat.com)
Mon, 29 Oct 2001 18:29:49 -0500


On Mon, Oct 29, 2001 at 03:22:28PM -0800, Linus Torvalds wrote:
> Does it make the accessed bit less reliable? Sure it does. But basically,
> either the page is accessed SO much that it stays in the TLB all the time
> (which is basically not really possible if you page heavily, I suspect),
> or it will age out of the TLB on its own at which point we get the
> accessed bit back.

Think of CPUs with tagged tlbs and lots of entries. Or even a system that
only runs 1 threaded app. Easily triggerable. If people want to optimise
it, great. But go for correctness first, please...

-ben
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