From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43734) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Z9ZKT-00022x-Vi for qemu-devel@nongnu.org; Mon, 29 Jun 2015 09:42:35 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Z9ZKQ-00064k-II for qemu-devel@nongnu.org; Mon, 29 Jun 2015 09:42:33 -0400 Received: from e23smtp02.au.ibm.com ([202.81.31.144]:51131) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Z9ZKP-00063e-VD for qemu-devel@nongnu.org; Mon, 29 Jun 2015 09:42:30 -0400 Received: from /spool/local by e23smtp02.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 29 Jun 2015 23:42:27 +1000 Received: from d23relay07.au.ibm.com (d23relay07.au.ibm.com [9.190.26.37]) by d23dlp03.au.ibm.com (Postfix) with ESMTP id 2052E3578048 for ; Mon, 29 Jun 2015 23:42:25 +1000 (EST) Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay07.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t5TDgGK262259220 for ; Mon, 29 Jun 2015 23:42:25 +1000 Received: from d23av03.au.ibm.com (localhost [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t5TDfqx9002330 for ; Mon, 29 Jun 2015 23:41:52 +1000 Date: Mon, 29 Jun 2015 19:11:30 +0530 From: Bharata B Rao Message-ID: <20150629134130.GJ5569@in.ibm.com> References: <1435566027-17061-1-git-send-email-bharata@linux.vnet.ibm.com> <1435566027-17061-5-git-send-email-bharata@linux.vnet.ibm.com> <20150629140820.6db4a4ab@nial.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150629140820.6db4a4ab@nial.brq.redhat.com> Subject: Re: [Qemu-devel] [PATCH v4 4/6] numa, pc-dimm: Store pc-dimm memory information in numa_info Reply-To: bharata@linux.vnet.ibm.com List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Igor Mammedov Cc: pbonzini@redhat.com, qemu-devel@nongnu.org, ehabkost@redhat.com, david@gibson.dropbear.id.au On Mon, Jun 29, 2015 at 02:08:20PM +0200, Igor Mammedov wrote: > On Mon, 29 Jun 2015 13:50:25 +0530 > Bharata B Rao wrote: > > > Start storing the (start_addr, end_addr) of the pc-dimm memory > > in corresponding numa_info[node] so that this information can be used > > to lookup node by address. > > > > Signed-off-by: Bharata B Rao > Reviewed-by: Igor Mammedov > > > --- > > hw/mem/pc-dimm.c | 4 ++++ > > include/sysemu/numa.h | 10 ++++++++++ > > numa.c | 26 ++++++++++++++++++++++++++ > > 3 files changed, 40 insertions(+) > > > > diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c > > index 98971b7..bb04862 100644 > > --- a/hw/mem/pc-dimm.c > > +++ b/hw/mem/pc-dimm.c > > @@ -97,6 +97,7 @@ 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); > > > > out: > > error_propagate(errp, local_err); > > @@ -105,6 +106,9 @@ out: > > void pc_dimm_memory_unplug(DeviceState *dev, MemoryHotplugState *hpms, > > MemoryRegion *mr) > > { > > + PCDIMMDevice *dimm = PC_DIMM(dev); > > + > > + 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); > > } > > diff --git a/include/sysemu/numa.h b/include/sysemu/numa.h > > index 6523b4d..7176364 100644 > > --- a/include/sysemu/numa.h > > +++ b/include/sysemu/numa.h > > @@ -10,16 +10,26 @@ > > > > extern int nb_numa_nodes; /* Number of NUMA nodes */ > > > > +struct numa_addr_range { > > + ram_addr_t mem_start; > > + ram_addr_t mem_end; > > + QLIST_ENTRY(numa_addr_range) entry; > > +}; > > + > > typedef struct node_info { > > uint64_t node_mem; > > DECLARE_BITMAP(node_cpu, MAX_CPUMASK_BITS); > > struct HostMemoryBackend *node_memdev; > > bool present; > > + QLIST_HEAD(, numa_addr_range) addr; /* List to store address ranges */ > > } NodeInfo; > > + > > extern NodeInfo numa_info[MAX_NODES]; > > void parse_numa_opts(MachineClass *mc); > > void numa_post_machine_init(void); > > void query_numa_node_mem(uint64_t node_mem[]); > > extern QemuOptsList qemu_numa_opts; > > +void numa_set_mem_node_id(ram_addr_t addr, uint64_t size, uint32_t node); > > +void numa_unset_mem_node_id(ram_addr_t addr, uint64_t size, uint32_t node); > > > > #endif > > diff --git a/numa.c b/numa.c > > index 91fc6c1..116d1fb 100644 > > --- a/numa.c > > +++ b/numa.c > > @@ -52,6 +52,28 @@ static int max_numa_nodeid; /* Highest specified NUMA node ID, plus one. > > int nb_numa_nodes; > > NodeInfo numa_info[MAX_NODES]; > > > > +void numa_set_mem_node_id(ram_addr_t addr, uint64_t size, uint32_t node) > > +{ > > + struct numa_addr_range *range = g_malloc0(sizeof(*range)); > > + > > + range->mem_start = addr; > > + range->mem_end = addr + size - 1; > nit: > as a patch on top of it, add asserts that check for overflow, pls You suggested g_assert(size) in the previous version. However size can be zero when this API is called for boot time memory and I have taken care of that in the next patch (5/6). And for pc-dimm memory, the size can never be zero. So do you still think overflow is possible ? Regards, Bharata.