On Mon, May 28, 2001 at 09:04:37PM +0900, Atsushi Onoe wrote:

 > >    An 1.5 branch kernel is strongly recommended. I have seen some
 > >    problems with -current kernels, like VMware panicing during win2000
 > >    installs, and during heavier disk access under Linux.
 > 
 > Though I'm not sure if it is the case, I can run win98 on vmware
 > on -current kernel with following patch.
 > (Vmware paniced on win98 boot without it)

So, PHOLD()/PRELE() affect, basically, the U-area/kernel stack.  Now,
it is true that UBC causes processes to be more aggressive swapped out
(thich needs to be fixed separately), and the PHOLD() would prevent
that...

-- 
        -- Jason R. Thorpe <thorpej@zembu.com>