[PATCH 0/4] fs/resctrl: Fix three long-standing issues

[Tony Luck <tony.luck@intel.com>]

Sashiko reported[0] a deadlock during mount, and a use-after-free when an
L3 domain is removed during CPU offline. Reinette found a memory leak
in the mount error path while refactoring code for a solution to the
mount hang.

Patch 1 just reorders some code so that fixes can be applied without
adding additional forward declaration of functions.

Patch 2 fixes the memory leak found by Reinette

Patch 3 fixes the mount deadlock[1]

Patch 4 fixes issues with CPU offline.[2]

N.B. Reinette did all the work for patches 3 & 4, so I listed her
as author an me as Co-developer. Those patches need her sign-off.

[0] Sashiko report:
Link: https://sashiko.dev/#/patchset/20260429184858.36423-1-tony.luck%40intel.com

[1] This is v3 of the deadlock fix. Previous version is here:
Link: https://lore.kernel.org/all/20260504220149.157753-1-tony.luck@intel.com/

[2] This is v2 of the CPU offline fix. Previous version is here:
Link: https://lore.kernel.org/all/20260501213611.25600-1-tony.luck@intel.com/


Reinette Chatre (2):
  fs/resctrl: Fix deadlock for errors during mount
  fs/resctrl: Fix issues with worker threads when CPUs are taken offline

Tony Luck (2):
  fs/resctrl: Move functions to avoid forward references in subsequent
    fixes
  fs/resctrl: Free mon_data structures on rdt_get_tree() failure

 fs/resctrl/monitor.c  |  55 ++++++
 fs/resctrl/rdtgroup.c | 440 ++++++++++++++++++++++--------------------
 2 files changed, 287 insertions(+), 208 deletions(-)

-- 
2.54.0