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V" Subject: [RFC PATCH v4 4/7] mm/demotion/dax/kmem: Set node's memory tier to MEMORY_TIER_PMEM Date: Fri, 27 May 2022 17:55:25 +0530 Message-Id: <20220527122528.129445-5-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220527122528.129445-1-aneesh.kumar@linux.ibm.com> References: <20220527122528.129445-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: lxJz5G3F24fRPN59Z5UgaLwEjy0CZpHn X-Proofpoint-ORIG-GUID: 7gNicu8INe--vcQ4WVA43G3AVzmpzCDX X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-05-27_03,2022-05-27_01,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 mlxscore=0 suspectscore=0 mlxlogscore=999 adultscore=0 lowpriorityscore=0 spamscore=0 malwarescore=0 impostorscore=0 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2204290000 definitions=main-2205270057 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jagdish Gediya By default, all nodes are assigned to DEFAULT_MEMORY_TIER which is memory tier 1 which is designated for nodes with DRAM, so it is not the right tier for dax devices. Set dax kmem device node's tier to MEMORY_TIER_PMEM, In future, support should be added to distinguish the dax-devices which should not be MEMORY_TIER_PMEM and right memory tier should be set for them. Signed-off-by: Jagdish Gediya Signed-off-by: Aneesh Kumar K.V --- drivers/dax/kmem.c | 4 ++++ mm/migrate.c | 2 ++ 2 files changed, 6 insertions(+) diff --git a/drivers/dax/kmem.c b/drivers/dax/kmem.c index a37622060fff..991782aa2448 100644 --- a/drivers/dax/kmem.c +++ b/drivers/dax/kmem.c @@ -11,6 +11,7 @@ #include #include #include +#include #include "dax-private.h" #include "bus.h" @@ -147,6 +148,9 @@ static int dev_dax_kmem_probe(struct dev_dax *dev_dax) dev_set_drvdata(dev, data); +#ifdef CONFIG_TIERED_MEMORY + node_set_memory_tier(numa_node, MEMORY_TIER_PMEM); +#endif return 0; err_request_mem: diff --git a/mm/migrate.c b/mm/migrate.c index d819a64db5b1..59d8558dd2ee 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2418,6 +2418,8 @@ int node_set_memory_tier(int node, int tier) return ret; } +EXPORT_SYMBOL_GPL(node_set_memory_tier); + /** * next_demotion_node() - Get the next node in the demotion path -- 2.36.1