On Mon, Oct 26, 2015 at 01:30:36PM +0530, Bharata B Rao wrote: > The suggested way to work around the virtio bug reported here > > http://lists.nongnu.org/archive/html/qemu-devel/2015-08/msg00522.html > > is to introduce gaps between DIMMs. Igor's patchset changes the pc-dimm > auto-address assignment to introduce gaps and ues the same from pc memhp. > This patchset does the same for sPAPR PowerPC. > > Before introducing the gap, ensure that memory hotplug region has enough > room for alignment adjustment. We accommodate a max alignment of 256MB for > each slot since sPAPR memory hotplug enforces an alignment requirement of > 256MB on RAM size, maxmem and NUMA node mem sizes. > > This applies on David's spapr-next branch.
This is already creating problems on x86. Instead of propagating this all over the place, let's fix things properly to either - handle requests that cross the DIMMs or - make sure guest physically contigious implies host virtually contigious > Changes in v2 > ------------- > - Minor rewording of patch description and code comment in 1/2. > > v1: http://lists.nongnu.org/archive/html/qemu-devel/2015-10/msg02414.html > v0: https://lists.gnu.org/archive/html/qemu-devel/2015-10/msg00749.html > > Bharata B Rao (2): > spapr: Accommadate alignment gaps in hotplug memory region > spapr: Force gaps between DIMM's GPA > > hw/ppc/spapr.c | 23 ++++++++++++++++++----- > 1 file changed, 18 insertions(+), 5 deletions(-) > > -- > 2.1.0
