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[v3,0/2] cxl/region: Improve Soft Reserved resource handling

Message ID cover.1692638817.git.alison.schofield@intel.com
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Series cxl/region: Improve Soft Reserved resource handling | expand

Message

Alison Schofield Aug. 21, 2023, 6:14 p.m. UTC 
From: Alison Schofield <alison.schofield@intel.com>

Changes in v3:
- dev_dbg() on failure to insert resource to a soft reserved parent (Jonathan)
  Continue, as in previous versions of this patch, to insert the resource
  to the root decoder if insert to SR parent fails or SR parent does not
  exist.
- Replace goto/unlock with guard(mutex) in remove_soft_reserved() (DaveJ)
- Use automatic resource cleanup in add_soft_reserved() (DaveJ)
- Fixups to commit log grammar (DaveJ)
 
v2: https://lore.kernel.org/linux-cxl/cover.1691176651.git.alison.schofield@intel.com/
 
Begin Cover Letter:
Make the CXL Region Driver handle these 2 observed scenarios:

1) Soft reserved resources were observed as sometimes being the parent
and sometimes being the child of a region resource. Patch 1 clears up
that inconsistency.

2) Soft reserved resources were also observed as stranded after region 
teardown, making the address space the region released unavailable for
reallocation. Patch 2 implements soft reserved resource removal.


Alison Schofield (2):
  cxl/region: Try to add a region resource to a soft reserved parent
  cxl/region: Remove a soft reserved resource at region teardown

 drivers/cxl/core/region.c | 187 ++++++++++++++++++++++++++++++++++----
 1 file changed, 168 insertions(+), 19 deletions(-)


base-commit: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5