On Fri, Nov 04, 2005 at 07:45:53PM -0600, Rob Landley wrote:
> Another advantage of prezeroing: it maps really well to what we're trying to
> do here. It makes a class of not just free but zeroed memory (and madvise
> zeroes the memory for us).
Yeah, we would need to keep track of zeroed pages somehow. This isn't
currently done, and it would require some generic kernel hooks. And it would
require them in some delicate places.
If there were some sort of background zeroing and tracking of zeroed pages
already there, it would be a lot easier for UML. Without that, I'm not sure
how to take advantage of the host's zeroing.
Jeff
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