[PATCH v4 0/3] fs/resctrl: Fix RMID limbo handling

[Jinjie Ruan]

Fix resctrl RMID allocation to report a retryable -EBUSY only when
the target CLOSID actually has RMIDs in limbo.

Split the domain-offline path out so it releases busy RMIDs without
allocating a monitor context it never uses.

Also unmount resctrl with the CDP state it was mounted with to fix
another bug with mpam cdp.

These fixes are split out of the v10 Narrow-PARTID series below.
        https://lore.kernel.org/all/20261020134239.3921377-1-ruanjinjie@xxxxxxxxxx/

Changes in v4:
- Fix the unmount resctrl bug as Reinette suggested.
- Adjust the commit message.
- Add Reviewed-bys.
- Link to v3:
  - https://lore.kernel.org/all/20261031063634.1678345-1-ruanjinjie@xxxxxxxxxx/
  - https://lore.kernel.org/all/20261031094616.1691026-1-ruanjinjie@xxxxxxxxxx/

Changes in v3:
- Add Reviewed-by.
- Local varibles uses reverse Christmas tree style.
- Update the commit message as Reinette suggested.
- Link to v2: https://lore.kernel.org/all/20261030092144.1233551-1-ruanjinjie@xxxxxxxxxx/

Changes in v2
- Update the commit message as Reinette suggested.
- Link to v1: https://lore.kernel.org/all/20261029081513.924019-1-ruanjinjie@xxxxxxxxxx/

Jinjie Ruan (3):
  fs/resctrl: Report a temporary RMID shortage per CLOSID
  fs/resctrl: Do not allocate a monitor context when releasing limbo
    RMIDs
  fs/resctrl: Unmount resctrl with the CDP state it was mounted with

 fs/resctrl/internal.h |   3 +-
 fs/resctrl/monitor.c  | 158 ++++++++++++++++++++++++++++++++----------
 fs/resctrl/rdtgroup.c |   9 ++-
 3 files changed, 130 insertions(+), 40 deletions(-)

-- 
2.34.1