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Scheduler fixes:

Browse source 
- Fix LLC mis-scheduling bugs (Tim Chen, Lu Wang)
 
  - Fix cache-grouping related scheduling statistics UAF bugs (Tim Chen)
 
  - Skip kernel threads for cache aware scheduling to rubustify the code
    (Chen Yu)
 
  - Refresh LLC capacity across CPU hotplug, to fix capacity
    underestimation bug (Davi Chaves Azevedo)
 
  - Account PSI IRQ time to the execution context, not the scheduling
    context, to fix proxy scheduling accounting bug (Zhan Xusheng)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-urgent-2026-09-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler fixes from Ingo Molnar:

 - Fix LLC mis-scheduling bugs (Tim Chen, Lu Wang)

 - Fix cache-grouping related scheduling statistics UAF bugs (Tim Chen)

 - Skip kernel threads for cache aware scheduling to rubustify the code
   (Chen Yu)

 - Refresh LLC capacity across CPU hotplug, to fix capacity
   underestimation bug (Davi Chaves Azevedo)

 - Account PSI IRQ time to the execution context, not the scheduling
   context, to fix proxy scheduling accounting bug (Zhan Xusheng)

* tag 'sched-urgent-2026-09-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/core: Account PSI IRQ time to the execution context, not the scheduling context
  sched/cache: Refresh LLC capacity across CPU hotplug, to fix capacity underestimation bug
  sched/cache: Skip kernel threads for cache aware scheduling to rubustify the code
  sched/cache: Introduce task_struct->sched_cache_grp to fix UAF
  sched/cache: Decouple sched_cache_group from mm to fix UAF
  sched/cache: Honor migrate_llc_task semantics in active load balance, to fix LLC mis-scheduling bug
  sched/cache: Keep nr_pref_llc_running in the runnable domain, to fix LLC mis-scheduling bug
This commit is contained in:
Linus Torvalds 2026-09-27 08:24:16 -07:00
commit 673dab7eac
10 changed files with 388 additions and 134 deletions
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