Le 08/02/2023 à 21:00, Vishal Verma a écrit :
While enumeration of ram type regions already works in libcxl and
cxl-cli, it lacked an attribute to indicate pmem vs. ram. Add a new
'type' attribute to region listings to address this. Additionally, add
support for creating ram regions to the cxl-create-region command. The
region listings are also updated with dax-region information for
volatile regions.
This also includes fixed for a few bugs / usability issues identified
along the way - patches 1, 4, and 6. Patch 5 is a usability improvement
where based on decoder capabilities, the type of a region can be
inferred for the create-region command.
These have been tested against the ram-region additions to cxl_test
which are part of the kernel support patch set[1].
Additionally, tested against qemu using a WIP branch for volatile
support found here[2]. The 'run_qemu' script has a branch that creates
volatile memdevs in addition to pmem ones. This is also in a branch[3]
since it depends on [2].
These cxl-cli / libcxl patches themselves are also available in a
branch at [4].
[1]:
https://lore.kernel.org/linux-cxl/167564534874.847146.5222419648551436750.st...@dwillia2-xfh.jf.intel.com/
[2]: https://gitlab.com/jic23/qemu/-/commits/cxl-2023-01-26
[3]: https://github.com/pmem/run_qemu/commits/vv/ram-memdevs
[4]: https://github.com/pmem/ndctl/tree/vv/volatile-regions
Hello Vishal
I am trying to play with this but all my attempts failed so far. Could
you provide Qemu and cxl-cli command-lines to get a volatile region
enabled in a Qemu VM?
Thanks
Brice
