On Thu, 2008-03-13 at 18:55 +0000, Hugh Dickins wrote: > On Thu, 13 Mar 2008, Jeremy Fitzhardinge wrote: > > > > My other concern is just correctness over time on the Linux side. We already > > have enough trouble keeping things like the pte and page structure state in > > sync, with resulting rare data-loss bugs. Adding another layer which only > > applies in specific environments raises the possibility for new bugs to be > > un-noticed for a long time. How can we structure the VM changes to make sure > > that its robust in the face of maintenance? > > Yes, that's the main concern, as whenever lots of subtlety is added. > I wonder if there's any chance of a CONFIG_DEBUG mode, which could be > run on anybody's x86 machine, without involving any virtualization, but > in which the PAGE_STATEs become essential to the correct working of the mm. How about a fake hypervisor, which is really just a random page evictor, following the rules of CMM? -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
