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On Tue, Nov 15, 2005 at 10:05:47AM +0900, YAMAMOTO Takashi wrote:
> > The right number is then swpgavail - swpginuse.
>=20
> no.  swpgavail - swpgonly.

So, swap pages also in RAM can be reclaimed by UVM and used to back
other pages going out?  Ok.=20

Now looks like:

size_t
tmpfs_mem_info(boolean_t total)
{
	size_t size;

	size =3D 0;
	size +=3D uvmexp.swpgavail;
	if (!total) {
		size -=3D uvmexp.swpgonly;
	}
	size +=3D uvmexp.free;
	size +=3D uvmexp.filepages;

	return size;
}

> > As long as that's non-zero,
>=20
> As long as that's larger than TMPFS_PAGES_RESERVED,

Yes, fair point, but that's taken care of by the macro that calls this
function.  The two should probably be unified if there are no other
call paths.

--
Dan.
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