> On Fri, Jul 27, 2007 at 07:46:31AM +0900, YAMAMOTO Takashi wrote:
> > >   I suppose there's a bit of a performance hit with zeroing out the page
> > > every time, but it seems like a necessary thing to do.  A couple other
> > > OSes I've tried it on do so.
> > 
> > which os?
> 
> hpux 11 on Itanium and some variant of linux.  I'm not sure which, and I 
> don't have access to that machine right now.  Probably an older version of
> RedHat.
> 
> eric

i don't think recent linux does it.  (i don't know about older ones.)
iirc, hpux doesn't have ubc.

YAMAMOTO Takashi