>>>>> On Wed, 12 Mar 1997 12:52:16 -0800,
	Jason Thorpe <thorpej@nas.nasa.gov> said:

> Anyhow, the diffs are attached below.  Please sanity-check them and
> comment :-)

FreeBSD-2.1.X keeps the information in PG_FREE bit of struct vm_page::flags,
rather than bitmap, and it doesn't require extra memory.
(My client made/uses private patch to implement vm_page_alloc_contig()
 in this way.)
Is there specific reason not to do so ?

(FreeBSD-2.2.X and FreeBSD-current keep it differently, though.)
--
soda