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From:   Jagdish Gediya <jvgediya@linux.ibm.com>
To:     linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        akpm@linux-foundation.org
Cc:     baolin.wang@linux.alibaba.com, dave.hansen@linux.intel.com,
        ying.huang@intel.com, aneesh.kumar@linux.ibm.com,
        shy828301@gmail.com, weixugc@google.com, gthelen@google.com,
        dan.j.williams@intel.com, Jagdish Gediya <jvgediya@linux.ibm.com>
Subject: [PATCH v3 4/7] device-dax/kmem: Set node state as N_DEMOTION_TARGETS
Date:   Sat, 23 Apr 2022 01:25:13 +0530
Message-Id: <20220422195516.10769-5-jvgediya@linux.ibm.com>
In-Reply-To: <20220422195516.10769-1-jvgediya@linux.ibm.com>
References: <20220422195516.10769-1-jvgediya@linux.ibm.com>
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Set dax-device node as N_DEMOTION_TARGETS so that it
can be used as demotion target.

In future, support should be added to distinguish the
dax-devices which are not preferred as demotion target
e.g. HBM, for such devices, node shouldn't be set to
N_DEMOTION_TARGETS.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Jagdish Gediya <jvgediya@linux.ibm.com>
---
 drivers/dax/kmem.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dax/kmem.c b/drivers/dax/kmem.c
index a37622060fff..f42ab9d04bdf 100644
--- a/drivers/dax/kmem.c
+++ b/drivers/dax/kmem.c
@@ -147,6 +147,8 @@ static int dev_dax_kmem_probe(struct dev_dax *dev_dax)
 
 	dev_set_drvdata(dev, data);
 
+	node_set_state(numa_node, N_DEMOTION_TARGETS);
+
 	return 0;
 
 err_request_mem:
-- 
2.35.1