On Sat, 9 Feb 2008, Andrea Arcangeli wrote: > > Hmmmm.. that means we need something that actually pins pages for good so > > that the VM can avoid reclaiming it and so that page migration can avoid > > trying to migrate them. Something like yet another page flag. > > What's wrong with pinning with the page count like now? Dumb adapters > would simply not register themself in the mmu notifier list no?
Pages will still be on the LRU and cycle through rmap again and again. If page migration is used on those pages then the code may make repeated attempt to migrate the page thinking that the page count must at some point drop. I do not think that the page count was intended to be used to pin pages permanently. If we had a marker on such pages then we could take them off the LRU and not try to migrate them. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
