From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50936) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b3fpX-0007ez-Op for qemu-devel@nongnu.org; Fri, 20 May 2016 04:30:48 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b3fpR-0007qq-0u for qemu-devel@nongnu.org; Fri, 20 May 2016 04:30:46 -0400 Received: from mga02.intel.com ([134.134.136.20]:11980) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b3fpQ-0007pq-RW for qemu-devel@nongnu.org; Fri, 20 May 2016 04:30:40 -0400 From: Xiao Guangrong Date: Fri, 20 May 2016 16:20:00 +0800 Message-Id: <1463732412-99212-4-git-send-email-guangrong.xiao@linux.intel.com> In-Reply-To: <1463732412-99212-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1463732412-99212-1-git-send-email-guangrong.xiao@linux.intel.com> Subject: [Qemu-devel] [PATCH v2 03/15] pc-dimm: keep the state of the whole backend memory List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: pbonzini@redhat.com, imammedo@redhat.com Cc: gleb@kernel.org, mtosatti@redhat.com, stefanha@redhat.com, mst@redhat.com, rth@twiddle.net, ehabkost@redhat.com, dan.j.williams@intel.com, kvm@vger.kernel.org, qemu-devel@nongnu.org, Xiao Guangrong QEMU keeps the state of memory of dimm device during live migration, however, it is not enough for nvdimm device as its memory does not contain its label data, so that we should protect the whole backend memory instead Signed-off-by: Xiao Guangrong --- hw/mem/pc-dimm.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c index 6de2275..72b33ba 100644 --- a/hw/mem/pc-dimm.c +++ b/hw/mem/pc-dimm.c @@ -105,9 +105,16 @@ void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms, } memory_region_add_subregion(&hpms->mr, addr - hpms->base, mr); - vmstate_register_ram(mr, dev); numa_set_mem_node_id(addr, memory_region_size(mr), dimm->node); + /* + * save the state only for @mr is not enough as it does not contain + * the label data of NVDIMM device, so that we keep the state of + * whole hostmem instead. + */ + vmstate_register_ram(host_memory_backend_get_memory(dimm->hostmem, errp), + dev); + out: error_propagate(errp, local_err); } @@ -116,10 +123,12 @@ void pc_dimm_memory_unplug(DeviceState *dev, MemoryHotplugState *hpms, MemoryRegion *mr) { PCDIMMDevice *dimm = PC_DIMM(dev); + MemoryRegion *hostmem; + hostmem = host_memory_backend_get_memory(dimm->hostmem, &error_abort); numa_unset_mem_node_id(dimm->addr, memory_region_size(mr), dimm->node); memory_region_del_subregion(&hpms->mr, mr); - vmstate_unregister_ram(mr, dev); + vmstate_unregister_ram(hostmem, dev); } static int pc_existing_dimms_capacity_internal(Object *obj, void *opaque) -- 1.8.3.1