On Mon, Apr 07, 2014 at 12:27:10PM -0700, H. Peter Anvin wrote: > 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?
Seems so, at least for non-kernel pages (not considering this bit references in xen code, which i simply don't know but i guess it's used for kernel pages only). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/