From owner-freebsd-arch  Wed Aug 22  9:55:27 2001
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Subject: Re: CFR: Timing to enable CR4.PGE bit 
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Date: Thu, 23 Aug 2001 01:54:12 +0900
From: Mitsuru IWASAKI <iwasaki@jp.FreeBSD.org>
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Hi,

> > 3.7. TRANSLATION LOOKASIDE BUFFERS (TLBS)
> > [snip]
> > When the processor loads a page-directory or page-table entry for a
> > global page into a TLB, the entry will remain in the TLB indefinitely.
>                                                            ^^^^^^^^^^^^
> > The only way to deterministically invalidate global page entries is to
> > clear the PGE flag and then invalidate the TLBs or to use the INVLPG
> > instruction to invalidate individual page-directory or page-table
> > entries in the TLBs.
> > ----
> 
> I think this just means that it is hard to say how long the entries remain
> in the TLB, not thatthey remain there forever.

Ah, understood.  Japanese version of this document said it's something
like `forever' in Japanese translation for this meaning :-)
This is why I worried about this too much.  Sorry about that.

Thanks

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