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[0/3] irqchip/gic-v3-its: Fix LPI pending table handling vs PREEMPT_RT

Message ID 20211022103307.1711619-1-valentin.schneider@arm.com (mailing list archive)
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Series irqchip/gic-v3-its: Fix LPI pending table handling vs PREEMPT_RT | expand

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Valentin Schneider Oct. 22, 2021, 10:33 a.m. UTC 
Hi folks,

This is my take at fixing [1]. Reading about the LPI tables situation was
entertaining.

Tested against kexec on an Ampere eMAG. Seems to be working fine atop
5.15-rc6. On the other hand, I can only issue one kexec from 5.15-rc6-rt12 - if
I then issue another one on the new kernel, I get tasks hanging. That is true
even without my patches and without CONFIG_PREEMPT_RT.

[1]: http://lore.kernel.org/r/20210810134127.1394269-3-valentin.schneider@arm.com

Cheers,
Valentin

Valentin Schneider (3):
  irqchip/gic-v3-its: Give the percpu rdist struct its own flags field
  irqchip/gic-v3-its: Postpone LPI pending table freeing and memreserve
  irqchip/gic-v3-its: Limit memreserve cpuhp state lifetime

 drivers/irqchip/irq-gic-v3-its.c   | 108 ++++++++++++++++++++++++-----
 include/linux/irqchip/arm-gic-v3.h |   3 +-
 2 files changed, 94 insertions(+), 17 deletions(-)

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2.25.1