From: Pingfan Liu <kernelfans@gmail.com>
To: linux-arm-kernel@lists.infradead.org
Cc: Pingfan Liu <kernelfans@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Marc Zyngier <maz@kernel.org>, Joey Gouly <joey.gouly@arm.com>,
Sami Tolvanen <samitolvanen@google.com>,
Julien Thierry <julien.thierry@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Yuichi Ito <ito-yuichi@fujitsu.com>,
linux-kernel@vger.kernel.org
Subject: [PATCHv2 0/5] arm64/irqentry: remove duplicate housekeeping of
Date: Fri, 24 Sep 2021 21:28:32 +0800 [thread overview]
Message-ID: <20210924132837.45994-1-kernelfans@gmail.com> (raw)
After introducing arm64/kernel/entry_common.c which is akin to
kernel/entry/common.c , the housekeeping of rcu/trace are done twice as
the following:
enter_from_kernel_mode()->rcu_irq_enter().
And
gic_handle_irq()->...->handle_domain_irq()->irq_enter()->rcu_irq_enter()
Besides redundance, based on code analysis, the redundance also raise
some mistake, e.g. rcu_data->dynticks_nmi_nesting inc 2, which causes
rcu_is_cpu_rrupt_from_idle() unexpected.
Nmi also faces duplicate accounts. This series aims to address these
duplicate issues.
[1-2/5]: address nmi account duplicate
[3-4/5]: address rcu housekeeping duplicate in irq
[5/5]: as a natural result of [3-4/5], address a history issue. [1]
History:
v1 -> v2:
change the subject as the motivation varies.
add the fix for nmi account duplicate
The subject of v1 is "[PATCH 1/3] kernel/irq: __handle_domain_irq()
makes irq_enter/exit arch optional". [2] It is brought up to fix [1].
There have been some tries to enable crash-stop-NMI on arm64, one by me,
the other by Yuichi's [4]. I hope after this series, they can advance,
as Marc said in [3] "No additional NMI patches will make it until we
have resolved the issues"
[1] https://lore.kernel.org/linux-arm-kernel/87lfewnmdz.fsf@nanos.tec.linutronix.de/
[2] https://lore.kernel.org/linux-arm-kernel/1607912752-12481-1-git-send-email-kernelfans@gmail.com
[3] https://lore.kernel.org/linux-arm-kernel/afd82be798cb55fd2f96940db7be78c0@kernel.org
[4] https://lore.kernel.org/linux-arm-kernel/20201104080539.3205889-1-ito-yuichi@fujitsu.com
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Joey Gouly <joey.gouly@arm.com>
Cc: Sami Tolvanen <samitolvanen@google.com>
Cc: Julien Thierry <julien.thierry@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yuichi Ito <ito-yuichi@fujitsu.com>
Cc: linux-kernel@vger.kernel.org
To: linux-arm-kernel@lists.infradead.org
Pingfan Liu (5):
arm64/entry-common: push the judgement of nmi ahead
irqchip/GICv3: expose handle_nmi() directly
kernel/irq: make irq_{enter,exit}() in handle_domain_irq() arch
optional
irqchip/GICv3: let gic_handle_irq() utilize irqentry on arm64
irqchip/GICv3: make reschedule-ipi light weight
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/irq.h | 7 ++++
arch/arm64/kernel/entry-common.c | 45 +++++++++++++++-------
arch/arm64/kernel/irq.c | 29 ++++++++++++++
drivers/irqchip/irq-gic-v3.c | 66 ++++++++++++++++++++------------
kernel/irq/Kconfig | 3 ++
kernel/irq/irqdesc.c | 4 ++
7 files changed, 116 insertions(+), 39 deletions(-)
--
2.31.1
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next reply other threads:[~2021-09-24 13:30 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-24 13:28 Pingfan Liu [this message]
2021-09-24 13:28 ` [PATCHv2 1/5] arm64/entry-common: push the judgement of nmi ahead Pingfan Liu
2021-09-24 17:53 ` Mark Rutland
2021-09-25 15:39 ` Pingfan Liu
2021-09-30 13:32 ` Mark Rutland
2021-10-08 4:01 ` Pingfan Liu
2021-10-08 14:55 ` Pingfan Liu
2021-10-08 17:25 ` Mark Rutland
2021-10-09 3:49 ` Pingfan Liu
2021-10-08 15:45 ` Paul E. McKenney
2021-10-09 4:14 ` Pingfan Liu
2021-09-24 13:28 ` [PATCHv2 2/5] irqchip/GICv3: expose handle_nmi() directly Pingfan Liu
2021-09-24 13:28 ` [PATCHv2 3/5] kernel/irq: make irq_{enter, exit}() in handle_domain_irq() arch optional Pingfan Liu
2021-09-28 8:55 ` [PATCHv2 3/5] kernel/irq: make irq_{enter,exit}() " Mark Rutland
2021-09-29 3:15 ` Pingfan Liu
2021-09-24 13:28 ` [PATCHv2 4/5] irqchip/GICv3: let gic_handle_irq() utilize irqentry on arm64 Pingfan Liu
2021-09-28 9:10 ` Mark Rutland
2021-09-29 3:10 ` Pingfan Liu
2021-09-29 7:20 ` Marc Zyngier
2021-09-29 8:27 ` Pingfan Liu
2021-09-29 9:23 ` Mark Rutland
2021-09-29 11:40 ` Pingfan Liu
2021-09-29 14:29 ` Pingfan Liu
2021-09-29 17:41 ` Mark Rutland
2021-09-24 13:28 ` [PATCHv2 5/5] irqchip/GICv3: make reschedule-ipi light weight Pingfan Liu
2021-09-29 7:24 ` Marc Zyngier
2021-09-29 8:32 ` Pingfan Liu
2021-09-24 17:36 ` [PATCHv2 0/5] arm64/irqentry: remove duplicate housekeeping of Mark Rutland
2021-09-24 22:59 ` Paul E. McKenney
2021-09-27 9:23 ` Mark Rutland
2021-09-28 0:09 ` Paul E. McKenney
2021-09-28 8:32 ` Mark Rutland
2021-09-28 8:35 ` Mark Rutland
2021-09-28 9:52 ` Sven Schnelle
2021-09-28 10:26 ` Mark Rutland
2021-09-28 13:55 ` Paul E. McKenney
2021-09-25 15:12 ` Pingfan Liu
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