Hi Vishal,
With the QoS class series merged to the v6.8 kernel, can you please review and
apply this series to ndctl if acceptable?
v3:
- Rebase against latest ndctl/pending branch.
The series adds support for the kernel enabling of QoS class in the v6.8
kernel. The kernel exports a qos_class token for the root decoders (CFMWS) and
as
well as for the CXL memory devices. The qos_class exported for a device is
calculated by the driver during device probe. Currently a qos_class is exported
for the volatile partition (ram) and another for the persistent partition
(pmem).
In the future qos_class will be exported for DCD regions. Display of qos_class
is
through the CXL CLI list command with -vvv for extra verbose.
A qos_class check as also been added for region creation. A warning is emitted
when the qos_class of a memory range of a CXL memory device being included in
the CXL region assembly does not match the qos_class of the root decoder.
Options
are available to suppress the warning or to fail the region creation. This
enabling provides a guidance on flagging memory ranges being used is not
optimal for performance for the CXL region to be formed.
---
Dave Jiang (3):
ndctl: cxl: Add QoS class retrieval for the root decoder
ndctl: cxl: Add QoS class support for the memory device
ndctl: cxl: add QoS class check for CXL region creation
Documentation/cxl/cxl-create-region.txt | 9 ++++
cxl/filter.h | 4 ++
cxl/json.c | 46 ++++++++++++++++-
cxl/lib/libcxl.c | 62 +++++++++++++++++++++++
cxl/lib/libcxl.sym | 3 ++
cxl/lib/private.h | 3 ++
cxl/libcxl.h | 10 ++++
cxl/list.c | 1 +
cxl/region.c | 67 ++++++++++++++++++++++++-
util/json.h | 1 +
10 files changed, 204 insertions(+), 2 deletions(-)
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