> Yeah, MADV_DONTNEED looks right. UML and Linux/s390 (assuming VM has the
> equivalent of MADV_DONTNEED) would need a hook in free_pages to make that
> happen.
VM allows you to give it back a page and if you use it again you get a
clean copy. What it seems to lack is the more ideal "here have this page
and if I reuse it trap if you did throw it out" semantic.
> > That BTW is an issue for more than UML - it has a bearing on running
> > lots of Linux instances on any supervisor/virtualising system like S/390
>
> On a side note, the "unused memory is wasted memory" behavior that UML and
> Linux/s390 inherit is also less than optimal for the host.
Yes. I believe IBM folks are studying that
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This archive was generated by hypermail 2b29 : Thu Mar 07 2002 - 21:00:57 EST