Messages in this thread | | | Date | Mon, 07 Apr 2014 12:27:10 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH 2/3] x86: Define _PAGE_NUMA with unused physical address bits PMD and PTE levels |
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On 04/07/2014 11:28 AM, Mel Gorman wrote: > > I had considered the soft-dirty tracking usage of the same bit. I thought I'd > be able to swizzle around it or a further worst case of having soft-dirty and > automatic NUMA balancing mutually exclusive. Unfortunately upon examination > it's not obvious how to have both of them share a bit and I suspect any > attempt to will break CRIU. In my current tree, NUMA_BALANCING cannot be > set if MEM_SOFT_DIRTY which is not particularly satisfactory. Next on the > list is examining if _PAGE_BIT_IOMAP can be used. >
Didn't we smoke the last user of _PAGE_BIT_IOMAP?
-hpa
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