>>> On 09.03.16 at 19:46, <david.vra...@citrix.com> wrote: > 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.
But which is wrong, as it would again cover both the always visible part and that visible only outside of the context of PV guests. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
