Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753710AbbFSUB4 (ORCPT ); Fri, 19 Jun 2015 16:01:56 -0400 Received: from mail2-relais-roc.national.inria.fr ([192.134.164.83]:17926 "EHLO mail2-relais-roc.national.inria.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752783AbbFSUBs (ORCPT ); Fri, 19 Jun 2015 16:01:48 -0400 X-IronPort-AV: E=Sophos;i="5.13,644,1427752800"; d="scan'208";a="166334209" Message-ID: <5584752A.6040706@gmail.com> Date: Fri, 19 Jun 2015 22:01:46 +0200 From: Brice Goglin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.7.0 MIME-Version: 1.0 To: Toshi Kani , rjw@rjwysocki.net, dan.j.williams@intel.com CC: linux-acpi@vger.kernel.org, linux-nvdimm@ml01.01.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 3/3] libnvdimm: Add sysfs numa_node to NVDIMM devices References: <1434737914-18466-1-git-send-email-toshi.kani@hp.com> <1434737914-18466-4-git-send-email-toshi.kani@hp.com> In-Reply-To: <1434737914-18466-4-git-send-email-toshi.kani@hp.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4866 Lines: 140 Do you have local_cpus and local_cpulist attributes as well? User-space tools such as hwloc use those for binding near I/O devices, although I guess we could have some CPU-less NVDIMM NUMA nodes? Brice Le 19/06/2015 20:18, Toshi Kani a ?crit : > Add support of sysfs 'numa_node' to I/O-related NVDIMM devices > under /sys/bus/nd/devices, regionN, namespaceN.0, and bttN. > When bttN is not set up, its numa_node returns -1 (NUMA_NO_NODE). > > An example of numa_node values on a 2-socket system with a single > NVDIMM range on each socket is shown below. > /sys/bus/nd/devices > |-- btt0/numa_node:-1 > |-- btt1/numa_node:0 > |-- namespace0.0/numa_node:0 > |-- namespace1.0/numa_node:1 > |-- region0/numa_node:0 > |-- region1/numa_node:1 > > These numa_node files are then linked under the block class of > their device names. > /sys/class/block/pmem0/device/numa_node:0 > /sys/class/block/pmem0s/device/numa_node:0 > /sys/class/block/pmem1/device/numa_node:1 > > This enables numactl(8) to accept 'block:' and 'file:' paths of > pmem and btt devices as shown in the examples below. > numactl --preferred block:pmem0 --show > numactl --preferred file:/dev/pmem0s --show > > Signed-off-by: Toshi Kani > --- > drivers/acpi/nfit.c | 1 + > drivers/nvdimm/btt_devs.c | 1 + > drivers/nvdimm/bus.c | 30 ++++++++++++++++++++++++++++++ > drivers/nvdimm/namespace_devs.c | 1 + > include/linux/libnvdimm.h | 1 + > 5 files changed, 34 insertions(+) > > diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c > index 5997753..9cb63ac 100644 > --- a/drivers/acpi/nfit.c > +++ b/drivers/acpi/nfit.c > @@ -873,6 +873,7 @@ static const struct attribute_group *acpi_nfit_region_attribute_groups[] = { > &nd_region_attribute_group, > &nd_mapping_attribute_group, > &nd_device_attribute_group, > + &nd_numa_attribute_group, > &acpi_nfit_region_attribute_group, > NULL, > }; > diff --git a/drivers/nvdimm/btt_devs.c b/drivers/nvdimm/btt_devs.c > index bcf77dc..a7b192f 100644 > --- a/drivers/nvdimm/btt_devs.c > +++ b/drivers/nvdimm/btt_devs.c > @@ -308,6 +308,7 @@ static struct attribute_group nd_btt_attribute_group = { > static const struct attribute_group *nd_btt_attribute_groups[] = { > &nd_btt_attribute_group, > &nd_device_attribute_group, > + &nd_numa_attribute_group, > NULL, > }; > > diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c > index 67525f9..03c0ee1 100644 > --- a/drivers/nvdimm/bus.c > +++ b/drivers/nvdimm/bus.c > @@ -420,6 +420,36 @@ struct attribute_group nd_device_attribute_group = { > }; > EXPORT_SYMBOL_GPL(nd_device_attribute_group); > > +static ssize_t numa_node_show(struct device *dev, > + struct device_attribute *attr, char *buf) > +{ > + return sprintf(buf, "%d\n", dev_to_node(dev)); > +} > +static DEVICE_ATTR_RO(numa_node); > + > +static struct attribute *nd_numa_attributes[] = { > + &dev_attr_numa_node.attr, > + NULL, > +}; > + > +static umode_t nd_numa_attr_visible(struct kobject *kobj, struct attribute *a, > + int n) > +{ > + if (!IS_ENABLED(CONFIG_NUMA)) > + return 0; > + > + return a->mode; > +} > + > +/** > + * nd_numa_attribute_group - NUMA attributes for all devices on an nd bus > + */ > +struct attribute_group nd_numa_attribute_group = { > + .attrs = nd_numa_attributes, > + .is_visible = nd_numa_attr_visible, > +}; > +EXPORT_SYMBOL_GPL(nd_numa_attribute_group); > + > int nvdimm_bus_create_ndctl(struct nvdimm_bus *nvdimm_bus) > { > dev_t devt = MKDEV(nvdimm_bus_major, nvdimm_bus->id); > diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c > index 0fe541a..47f3f29 100644 > --- a/drivers/nvdimm/namespace_devs.c > +++ b/drivers/nvdimm/namespace_devs.c > @@ -1141,6 +1141,7 @@ static struct attribute_group nd_namespace_attribute_group = { > static const struct attribute_group *nd_namespace_attribute_groups[] = { > &nd_device_attribute_group, > &nd_namespace_attribute_group, > + &nd_numa_attribute_group, > NULL, > }; > > diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h > index 30b3dea..75e3af0 100644 > --- a/include/linux/libnvdimm.h > +++ b/include/linux/libnvdimm.h > @@ -38,6 +38,7 @@ enum { > extern struct attribute_group nvdimm_bus_attribute_group; > extern struct attribute_group nvdimm_attribute_group; > extern struct attribute_group nd_device_attribute_group; > +extern struct attribute_group nd_numa_attribute_group; > extern struct attribute_group nd_region_attribute_group; > extern struct attribute_group nd_mapping_attribute_group; > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in Please read the FAQ at http://www.tux.org/lkml/