Re: [Qemu-devel] [PATCH v5 0/3] s390: Support for Hotplug of Standby Memory

[Igor Mammedov <imammedo@redhat.com>]

On Wed, 25 Jun 2014 10:26:57 -0400
Matthew Rosato <mjrosato@linux.vnet.ibm.com> wrote:

> This patchset adds support in s390 for a pool of standby memory,
> which can be set online/offline by the guest (ie, via chmem).
> The standby pool of memory is allocated as the difference between 
> the initial memory setting and the maxmem setting.
> As part of this work, additional results are provided for the 
> Read SCP Information SCLP, and new implentation is added for the 
> Read Storage Element Information, Attach Storage Element, 
> Assign Storage and Unassign Storage SCLPs, which enables the s390 
> guest to manipulate the standby memory pool.
> 
> This patchset is based on work originally done by Jeng-Fang (Nick)
> Wang.
Could you add short description how to test it, please.

> 
> Changes for v5:
>  * Since ACPI memory hotplug is now in, removed Igor's patches 
>    from this set.
>  * Updated sclp.c to use object_resolve_path() instead of 
>    object_property_find().
> 
> Changes for v4:
>  * Remove initialization code from get_sclp_memory_hotplug_dev()
>    and place in its own function, init_sclp_memory_hotplug_dev().
>  * Add hit to qemu-options.hx to note the fact that the memory 
>    size specified via -m might be forced to a boundary.
>  * Account for the legacy s390 machine, which does not support 
>    memory hotplug.
>  * Fix a bug in sclp.c - Change memory hotplug device parent to 
>    sysbus.
>  * Pulled latest version of Igor's patch. 
> 
> Matthew Rosato (3):
>   sclp-s390: Add device to manage s390 memory hotplug
>   virtio-ccw: Include standby memory when calculating storage increment
>   sclp-s390: Add memory hotplug SCLPs
> 
>  hw/s390x/s390-virtio-ccw.c |   46 +++++--
>  hw/s390x/sclp.c            |  289 +++++++++++++++++++++++++++++++++++++++++++-
>  include/hw/s390x/sclp.h    |   20 +++
>  qemu-options.hx            |    3 +-
>  target-s390x/cpu.h         |   18 +++
>  target-s390x/kvm.c         |    5 +
>  6 files changed, 366 insertions(+), 15 deletions(-)
>