Messages in this thread | | | Subject | Re: [RFC] Arch option to touch newly allocated pages | Date | Wed, 6 Mar 2002 20:54:14 +0000 (GMT) | From | Alan Cox <> |
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> 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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