On Mon, Aug 03, 2015 at 11:05:38AM +0530, Bharata B Rao wrote: > This patchset includes some updates to sPAPR memory hotplug code that > currently resides in spapr-next branch of David Gibson's tree. > > The main change here is to use drc-count hotplug identifier type for memory > hotplug. Currently we use drc-index type of hotplug identifier for > memory, which means that we send one EPOW event to guest on hotplug > of each LMB. Guest kernel has limited buffer space to hold these events > and we can easily overflow this buffer leading to missing of memory > hotplug events. After we switch to drc-count type of hotplug identifier, > we will send only one event to guest on hotplugging each pc-dimm device > thereby reducing the chances of guest rtas buffer overflow. This change > allows us to hotplug huge amounts of memory (>16G) in one pc-dimm > hotplug request. > > Another change here is to not include information about memory specified > using -m option in ibm,drc-names, ibm,drc-indexes and > ibm,dynamic-memory-reconfiguration nodes thus having only truly DR capable > memory in these DT nodes/properties. > > Bharata B Rao (5): > spapr: Provide better error message when slots exceed max allowed > spapr: Populate ibm,associativity-lookup-arrays correctly for non-NUMA > spapr: Revert to memory@XXXX representation for non-hotplugged memory > spapr: Support hotplug by specifying DRC count > spapr: Move memory hotplug to RTAS_LOG_V6_HP_ID_DRC_COUNT type > > hw/ppc/spapr.c | 58 > +++++++++++++------------------------------------- > hw/ppc/spapr_events.c | 47 ++++++++++++++++++++++++++++++++-------- > hw/ppc/spapr_pci.c | 4 ++-- > include/hw/ppc/spapr.h | 8 +++++-- > 4 files changed, 61 insertions(+), 56 deletions(-)
I've merged patches 1..3/5 into spapr-next. 4 & 5 I need to think
about a bit more.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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