Subject: Re: Multiple page sizes and the pmap API
To: Jared D. McNeill <>
From: Jason R Thorpe <>
List: tech-kern
Date: 12/06/2001 13:29:50
On Thu, Dec 06, 2001 at 05:02:05PM -0400, Jared D. McNeill wrote:

 > It supports anywhere between 4KB and 4GB page sizes (in powers of
 > two), with different page sizes at the same time. VSPM will also work
 > together with traditional 4KB pages.

So, the number of entries in the table in that case would be:

	log2(largest-page-size) - log2(smallest-page-size)

...assuming you wanted to describe the entire range.  Like I said,
you could also advertise a subset of useful page sizes.

        -- Jason R. Thorpe <>