On 12 Nov 1999 20:03:10 -0500 
 root@ihack.net (Charles M. Hannum) wrote:

 > Secondly, the implications for pmap implementations are not
 > sufficiently documented.  For example, if a pmap were to allocate a
 > new page for pv_entry structures or a page table page, and then
 > release it on failure, it's possible for the process to starve
 > indefinitely if another process is chewing up memory as it becomes
 > available.  Thus, this change requires that pmap_enter() never free
 > pages that it allocated.

I can always back it out, and we can go back to panic'ing on low memory
conditions.  Is that what you want?

Have fun at Comdex.

        -- Jason R. Thorpe <thorpej@nas.nasa.gov>