On Tue, Apr 01, 2025 at 09:59:20PM -0400, Gregory Price wrote: > Device capacity intended for use as system ram should be aligned to the > archite-defined memory block size or that capacity will be silently > truncated and capacity stranded. > > As hotplug dax memory becomes more prevelant, the memory block size > alignment becomes more important for platform and device vendors to > pay attention to - so this truncation should not be silent. > > This issue is particularly relevant for CXL Dynamic Capacity devices, > whose capacity may arrive in spec-aligned but block-misaligned chunks. > > Suggested-by: David Hildenbrand <da...@redhat.com> > Suggested-by: Dan Williams <dan.j.willi...@intel.com> > Signed-off-by: Gregory Price <gou...@gourry.net>
Existing unit test 'daxctl-devices.sh' hits this case: [ 52.547521] kmem dax3.0: DAX region truncated by 62.0 MiB due to alignment Tested-by: Alison Schofield <alison.schofi...@intel.com> snip >
