On Mon, 10 Nov 2014, Stefano Stabellini wrote: > > BTW, pfn_valid() is more expensive than simply comparing the mfn with > > pfn for dom0. The calling code knows this already and it may be quicker > > to simply pass a "bool foreign" argument. > > Good point, I can compare mfn and pfn here. > I cannot do the same in unmap_page and the various sync operations, > because there is no pfn available, but maybe I could use > set_page_private to set a flag. I'll think about it.
But of course there is no struct page either so I think pfn_valid will have to stay in unmap and sync -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
