Re: [Qemu-devel] [PATCH v7 2/3] qmp: introduce query-memory-size-summary command

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Igor Mammedov (imammedo@redhat.com) wrote:
> On Tue, 29 Aug 2017 17:30:21 +0200
> Vadim Galitsyn <vadim.galitsyn@profitbricks.com> wrote:
> 
> > Add a new query-memory-size-summary command which provides the
> > following memory information in bytes:
> > 
> >   * base-memory - size of "base" memory specified with command line option -m.
> > 
> >   * plugged-memory - amount of memory that was hot-plugged.
> >     If target does not have CONFIG_MEM_HOTPLUG enabled, no
> >     value is reported.
> > 
> > Signed-off-by: Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com>
> > Signed-off-by: Mohammed Gamal <mohammed.gamal@profitbricks.com>
> > Signed-off-by: Eduardo Otubo <eduardo.otubo@profitbricks.com>
> > Signed-off-by: Vadim Galitsyn <vadim.galitsyn@profitbricks.com>
> > Reviewed-by: Eugene Crosser <evgenii.cherkashin@profitbricks.com>
> > Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
> > Cc: Markus Armbruster <armbru@redhat.com>
> > Cc: Igor Mammedov <imammedo@redhat.com>
> > Cc: Eric Blake <eblake@redhat.com>
> > Cc: qemu-devel@nongnu.org
> > ---
> >  qapi-schema.json                                   | 32 ++++++++++++++++++++++
> >  include/hw/mem/pc-dimm.h                           |  1 +
> >  hw/mem/pc-dimm.c                                   |  5 ++++
> >  qmp.c                                              | 13 +++++++++
> >  stubs/{qmp_pc_dimm_device_list.c => qmp_pc_dimm.c} |  5 ++++
> >  stubs/Makefile.objs                                |  2 +-
> >  6 files changed, 57 insertions(+), 1 deletion(-)
> >  rename stubs/{qmp_pc_dimm_device_list.c => qmp_pc_dimm.c} (68%)
> > 
> > diff --git a/qapi-schema.json b/qapi-schema.json
> > index 802ea53d00..9402ac3b3a 100644
> > --- a/qapi-schema.json
> > +++ b/qapi-schema.json
> > @@ -4407,6 +4407,38 @@
> >    'data': { 'name': 'str', '*migration-safe': 'bool', 'static': 'bool',
> >              '*unavailable-features': [ 'str' ], 'typename': 'str' } }
> >  
> > +##
> > +# @MemoryInfo:
> > +#
> > +# Actual memory information in bytes.
> > +#
> > +# @base-memory: size of "base" memory specified with command line
> > +#               option -m.
> > +#
> > +# @plugged-memory: size memory that can be hot-unplugged. This field
> > +#                  is omitted if target does support memory hotplug
> > +#                  (i.e. CONFIG_MEM_HOTPLUG not defined on build time).
> field description doesn't match what's actually reported.
> s/cat be/is/

Are you sure about that? That would read:
      size memory that is hot-unplugged

which doesn't sound right, since it's not be hot-unplugged
yet.

Dave

> s/does/doesn't/
> 
> > +#
> > +# Since: 2.11.0
> > +##
> > +{ 'struct': 'MemoryInfo',
> > +  'data'  : { 'base-memory': 'size', '*plugged-memory': 'size' } }
> > +
> > +##
> > +# @query-memory-size-summary:
> > +#
> > +# Return the amount of initially allocated and hot-plugged (if
> > +# enabled) memory in bytes.
> it could count dimm's on CLI, so not only hotplugged
> 
> s/hot-plugged/present hotpluggable/
> 
> > +#
> > +# Example:
> > +#
> > +# -> { "execute": "query-memory-size-summary" }
> > +# <- { "return": { "base-memory": 4294967296, "plugged-memory": 0 } }
> > +#
> > +# Since: 2.11.0
> > +##
> > +{ 'command': 'query-memory-size-summary', 'returns': 'MemoryInfo' }
> > +
> >  ##
> >  # @query-cpu-definitions:
> >  #
> > diff --git a/include/hw/mem/pc-dimm.h b/include/hw/mem/pc-dimm.h
> > index 6f8c3eb1b3..d83b957829 100644
> > --- a/include/hw/mem/pc-dimm.h
> > +++ b/include/hw/mem/pc-dimm.h
> > @@ -95,6 +95,7 @@ int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp);
> >  
> >  int qmp_pc_dimm_device_list(Object *obj, void *opaque);
> >  uint64_t pc_existing_dimms_capacity(Error **errp);
> > +uint64_t get_plugged_memory_size(void);
> >  void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms,
> >                           MemoryRegion *mr, uint64_t align, Error **errp);
> >  void pc_dimm_memory_unplug(DeviceState *dev, MemoryHotplugState *hpms,
> > diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
> > index bdf6649083..66eace5a5c 100644
> > --- a/hw/mem/pc-dimm.c
> > +++ b/hw/mem/pc-dimm.c
> > @@ -159,6 +159,11 @@ uint64_t pc_existing_dimms_capacity(Error **errp)
> >      return cap.size;
> >  }
> >  
> > +uint64_t get_plugged_memory_size(void)
> > +{
> > +    return pc_existing_dimms_capacity(&error_abort);
> > +}
> > +
> >  int qmp_pc_dimm_device_list(Object *obj, void *opaque)
> >  {
> >      MemoryDeviceInfoList ***prev = opaque;
> > diff --git a/qmp.c b/qmp.c
> > index b86201e349..e8c303116a 100644
> > --- a/qmp.c
> > +++ b/qmp.c
> > @@ -709,3 +709,16 @@ ACPIOSTInfoList *qmp_query_acpi_ospm_status(Error **errp)
> >  
> >      return head;
> >  }
> > +
> > +MemoryInfo *qmp_query_memory_size_summary(Error **errp)
> > +{
> > +    MemoryInfo *mem_info = g_malloc0(sizeof(MemoryInfo));
> > +
> > +    mem_info->base_memory = ram_size;
> > +
> > +    mem_info->plugged_memory = get_plugged_memory_size();
> > +    mem_info->has_plugged_memory =
> > +        mem_info->plugged_memory != (uint64_t)-1;
> > +
> > +    return mem_info;
> > +}
> > diff --git a/stubs/qmp_pc_dimm_device_list.c b/stubs/qmp_pc_dimm.c
> > similarity index 68%
> > rename from stubs/qmp_pc_dimm_device_list.c
> > rename to stubs/qmp_pc_dimm.c
> > index def211564d..9ddc4f619a 100644
> > --- a/stubs/qmp_pc_dimm_device_list.c
> > +++ b/stubs/qmp_pc_dimm.c
> > @@ -6,3 +6,8 @@ int qmp_pc_dimm_device_list(Object *obj, void *opaque)
> >  {
> >     return 0;
> >  }
> > +
> > +uint64_t get_plugged_memory_size(void)
> > +{
> > +    return (uint64_t)-1;
> > +}
> > diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
> > index e69c217aff..f5f139f310 100644
> > --- a/stubs/Makefile.objs
> > +++ b/stubs/Makefile.objs
> > @@ -33,7 +33,7 @@ stub-obj-y += uuid.o
> >  stub-obj-y += vm-stop.o
> >  stub-obj-y += vmstate.o
> >  stub-obj-$(CONFIG_WIN32) += fd-register.o
> > -stub-obj-y += qmp_pc_dimm_device_list.o
> > +stub-obj-y += qmp_pc_dimm.o
> >  stub-obj-y += target-monitor-defs.o
> >  stub-obj-y += target-get-monitor-def.o
> >  stub-obj-y += pc_madt_cpu_entry.o
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK