Re: [PATCH 0/13] maps: pagemap, kpagemap, and related cleanups

On Fri, 13 Apr 2007 12:24:51 -0500 Matt Mackall <mpm@xxxxxxxxxxx> wrote:

From /proc/kpagemap + /proc/*/pagemap, you can
basically synthesize any statistic you want, including all the
existing ones. For some data, /proc/pid/smaps (or /proc/meminfo) will
be considerably more efficient.

You'd need to poke clear_refs beforehand to make the referenced bits useful.

Actually, we also need to run around the ptes and collect the pte-referenced
bits too. I don't think your code copes with any of that?

No, and it probably should. Perhaps dirty as well, though I've kindof
lost the plot on how that works lately.

Dirty is OK: the VM keeps pte-dirtiness and page-dirtiness in sync now.
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