On 19/11/25 04:10PM, Dave Jiang wrote:
On 11/19/25 12:52 AM, Neeraj Kumar wrote:
Using these attributes region label is added/deleted into LSA. These
attributes are called from userspace (ndctl) after region creation.
Signed-off-by: Neeraj Kumar <[email protected]>
---
Documentation/ABI/testing/sysfs-bus-cxl | 22 ++++++
drivers/cxl/core/pmem_region.c | 93 ++++++++++++++++++++++++-
drivers/cxl/cxl.h | 7 ++
3 files changed, 121 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-bus-cxl
b/Documentation/ABI/testing/sysfs-bus-cxl
index c80a1b5a03db..76d79c03dde4 100644
--- a/Documentation/ABI/testing/sysfs-bus-cxl
+++ b/Documentation/ABI/testing/sysfs-bus-cxl
@@ -624,3 +624,25 @@ Description:
The count is persistent across power loss and wraps back to 0
upon overflow. If this file is not present, the device does not
have the necessary support for dirty tracking.
+
+
+What: /sys/bus/cxl/devices/regionZ/pmem_regionZ/region_label_update
+Date: Nov, 2025
+KernelVersion: v6.19
+Contact: [email protected]
+Description:
+ (RW) Write a boolean 'true' string value to this attribute to
+ update cxl region information into LSA as region label. It
+ uses nvdimm nd_region_label_update() to update cxl region
+ information saved during cxl region creation into LSA. This
+ attribute must be called at last during cxl region creation.
Please consider:
attribute must be written last during cxl region creation.
No need to mention kernel specifics like function names. Just give general
description of what the attribute does. Same for the next attribute below.
Also, does this attribute needs to be readable? The documentation above does
not explain the read attribute if so.
DJ
Fixed it in V5
Regards,
Neeraj
