On 09/03/16 15:23, Jan Beulich wrote: > > And there's a second issue here: map_pages_to_xen() updates > the idle page tables, only part of which is actually in use on a > huge machine in the context of a PV guest, so the above is also > risking a #PF on a guest address for the CLFLUSH. Setting the > new flag only when the virtual address the mapping of which > gets changed is within > [DIRECTMAP_VIRT_START, HYPERVISOR_VIRT_END) would > seem an acceptable assumption: We know we're never changing > the VFN <-> PFN relationship inside the 1:1 mapping.
Andrew suggested [DIRECTMAP_VIRT_START, DIRECTMAP_VIRT_END) which makes more sense to me. David _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
