Linus Torvalds 8b82c18bf9 Two RSEQ fixes: ...

- Fix overly spread-out RSEQ concurrency ID allocation pattern that
    regressed certain workloads.
 
  - Fix RSEQ registration syscall behavior on -EFAULT errors when
    CONFIG_DEBUG_RSEQ=y. (This debug option is disabled on most
    distributions.)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-urgent-2025-02-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull rseq fixes from Ingo Molnar:

 - Fix overly spread-out RSEQ concurrency ID allocation pattern that
   regressed certain workloads

 - Fix RSEQ registration syscall behavior on -EFAULT errors when
   CONFIG_DEBUG_RSEQ=y (This debug option is disabled on most
   distributions)

* tag 'sched-urgent-2025-02-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  rseq: Fix rseq registration with CONFIG_DEBUG_RSEQ
  sched: Compact RSEQ concurrency IDs with reduced threads and affinity

2025-02-22 09:30:04 -08:00

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