On Fri, Jan 29, 2016 at 04:24:02PM +1100, David Gibson wrote: > The hypervisor needs to know a guest is capable of using the HPT resizing > PAPR extension in order to make full advantage of it for memory hotplug. > > If the hypervisor knows the guest is HPT resize aware, it can size the > initial HPT based on the initial guest RAM size, relying on the guest to > resize the HPT when more memory is hot-added. Without this, the hypervisor > must size the HPT for the maximum possible guest RAM, which can lead to > a huge waste of space if the guest never actually expends to that maximum > size. > > This patch advertises the guest's support for HPT resizing via the > ibm,client-architecture-support OF interface. Obviously, the actual > encoding in the CAS vector is tentative until the extension is officially > incorporated into PAPR. For now we use bit 0 of (previously unused) byte 8 > of option vector 5. > > Signed-off-by: David Gibson <da...@gibson.dropbear.id.au>
Reviewed-by: Paul Mackerras <pau...@samba.org> _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
