ae86cbfef381 e3f5df762d4a
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Changed in: intel
Status: Fix Committed => Fix Released
** Changed in: linux (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1823595
Title:
[bug]Fix namespace section padding relative to other regions
Status in intel:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Bug description:
Description:
Commit cfe30b872058 "libnvdimm, pmem: adjust for section collisions with
'System RAM'" enabled the libnvdimm core to workaround occasions where
platform firmware arranges for "System RAM" and "Persistent Memory" to
collide within a single section boundary. Unfortunately, as reported in
this issue [1], platform firmware can inflict the same collision between
persistent memory regions.
The approach of interrogating iomem_resource does not work in this
case because platform firmware may merge multiple regions into a single
iomem_resource range. Instead provide a method to interrogate regions
that share the same parent bus.
This is a stop-gap until the core-MM can grow support for hotplug on
sub-section boundaries.
[1]: https://github.com/pmem/ndctl/issues/76
Commits:
ae86cbfef381 libnvdimm, pfn: Pad pfn namespaces relative to other regions
e3f5df762d4a tools/testing/nvdimm: Align test resources to 128M
Target Release: 19.04
Target Kernel: 5.0
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