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Tue, 12 Nov 2019 11:50:10 +0000 (GMT) Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 57B9E6A047; Tue, 12 Nov 2019 11:50:06 +0000 (GMT) Received: from skywalker.linux.ibm.com (unknown [9.199.45.124]) by b03ledav003.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 12 Nov 2019 11:50:05 +0000 (GMT) X-Mailer: emacs 26.2 (via feedmail 11-beta-1 I) From: "Aneesh Kumar K.V" To: Dan Williams , linux-nvdimm@lists.01.org Cc: peterz@infradead.org, dave.hansen@linux.intel.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 12/16] dax: Add numa_node to the default device-dax attributes In-Reply-To: <157309906102.1582359.4262088001244476001.stgit@dwillia2-desk3.amr.corp.intel.com> References: <157309899529.1582359.15358067933360719580.stgit@dwillia2-desk3.amr.corp.intel.com> <157309906102.1582359.4262088001244476001.stgit@dwillia2-desk3.amr.corp.intel.com> Date: Tue, 12 Nov 2019 17:20:03 +0530 Message-ID: <87imnps49g.fsf@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-11-12_03:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=2 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1910280000 definitions=main-1911120107 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Dan Williams writes: > It is confusing that device-dax instances publish a 'target_node' > attribute, but not a 'numa_node'. The 'numa_node' information is > available elsewhere in the sysfs device hierarchy, but it is not obvious > and not reliable from one device-dax instance-type (e.g. child devices > of nvdimm namespaces) to the next (e.g. 'hmem' devices defined by EFI > Specific Purpose Memory and the ACPI HMAT). > Reviewed-by: Aneesh Kumar K.V > Cc: Ira Weiny > Cc: Vishal Verma > Signed-off-by: Dan Williams > --- > drivers/dax/bus.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c > index ce6d648d7670..0879b9663eb7 100644 > --- a/drivers/dax/bus.c > +++ b/drivers/dax/bus.c > @@ -322,6 +322,13 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, > } > static DEVICE_ATTR_RO(modalias); > > +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 umode_t dev_dax_visible(struct kobject *kobj, struct attribute *a, int n) > { > struct device *dev = container_of(kobj, struct device, kobj); > @@ -329,6 +336,8 @@ static umode_t dev_dax_visible(struct kobject *kobj, struct attribute *a, int n) > > if (a == &dev_attr_target_node.attr && dev_dax_target_node(dev_dax) < 0) > return 0; > + if (a == &dev_attr_numa_node.attr && !IS_ENABLED(CONFIG_NUMA)) > + return 0; > return a->mode; > } > > @@ -337,6 +346,7 @@ static struct attribute *dev_dax_attributes[] = { > &dev_attr_size.attr, > &dev_attr_target_node.attr, > &dev_attr_resource.attr, > + &dev_attr_numa_node.attr, > NULL, > }; > > _______________________________________________ > Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org > To unsubscribe send an email to linux-nvdimm-leave@lists.01.org