[PATCH 0/1] arm64: enable PREEMPT_LAZY

[Valentin Schneider]

Hey folks,

This is a resubmission of Mark's patch [1]. I didn't end up changing anything
other than fluffing up the changelog.

I ran this under an arm64 VM, added some trace_printk's and checked that
sched_switch's between runnable hackbench threads would occurr in the right
conditions:
o with TIF_NEED_RESCHED_LAZY set
  o at the tick
  o at do_notify_resume()
o with TIF_NEED_RESCHED set  

[1]: https://lore.kernel.org/linux-rt-users/Z2B5y3HiLuRHPfdv@J2N7QTR9R3.cambridge.arm.com/

Cheers,
Valentin

Mark Rutland (1):
  arm64: enable PREEMPT_LAZY

 arch/arm64/Kconfig                   |  1 +
 arch/arm64/include/asm/thread_info.h | 16 +++++++++-------
 arch/arm64/kernel/entry-common.c     |  2 +-
 3 files changed, 11 insertions(+), 8 deletions(-)

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2.43.0