Hey,
This series introduces the daxctl support for sub-dividing soft-reserved
regions created by EFI/HMAT/efi_fake_mem. It's the userspace counterpart
of this recent patch series [0].
These new 'dynamic' regions can be partitioned into multiple different devices
which its subdivisions can consist of one or more ranges. This
is in contrast to static dax regions -- created with ndctl-create-namespace
-m devdax -- which can't be subdivided neither discontiguous.
See also cover-letter of [0].
The daxctl changes in these patches are depicted as:
* {create,destroy,disable,enable}-device:
These orchestrate/manage the sub-division devices.
It mimmics the same as namespaces equivalent commands.
* Allow reconfigure-device to change the size of an existing *dynamic* dax
device.
* Add test coverage (so far tried to cover all range allocation code paths,
but I am still fishing for bugs). Additionally, there are bugs so applying
[0] may not make it pass the added functional test yet.
I am sending the series earlier (i.e. before the kernel patches get merged)
mainly to share a common unit tests, and also letting others try it out.
The only TODOs left is documentation, and perhaps listing of the mappingX sysfs
entries.
Thoughts, comments appreciated. :)
Thanks!
Joao
[0] "device-dax: Support sub-dividing soft-reserved ranges",
https://lore.kernel.org/linux-nvdimm/158500767138.2088294.17131646259803932461.st...@dwillia2-desk3.amr.corp.intel.com/
Dan Williams (1):
daxctl: Cleanup whitespace
Joao Martins (9):
libdaxctl: add daxctl_dev_set_size()
daxctl: add resize support in reconfigure-device
daxctl: add command to disable devdax device
daxctl: add command to enable devdax device
libdaxctl: add daxctl_region_create_dev()
daxctl: add command to create device
libdaxctl: add daxctl_region_destroy_dev()
daxctl: add command to destroy device
daxctl/test: Add tests for dynamic dax regions
daxctl/builtin.h | 4 +
daxctl/daxctl.c | 4 +
daxctl/device.c | 310 ++++++++++++++++++++++++++++++++++++++-
daxctl/lib/libdaxctl.c | 67 +++++++++
daxctl/lib/libdaxctl.sym | 7 +
daxctl/libdaxctl.h | 3 +
test/Makefile.am | 1 +
test/daxctl-create.sh | 293 ++++++++++++++++++++++++++++++++++++
util/filter.c | 2 +-
9 files changed, 686 insertions(+), 5 deletions(-)
create mode 100755 test/daxctl-create.sh
--
2.17.1
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