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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: linux-kernel@vger.kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH 0/5] irq_work: PREEMPT_RT bits
Date: Mon, 27 Sep 2021 23:19:14 +0200	[thread overview]
Message-ID: <20210927211919.310855-1-bigeasy@linutronix.de> (raw)

This are the PREEMPT_RT bits for irq_work. The annotation for
IRQ_WORK_HARD_IRQ was already merged except for one missed annotation.
Patch #4 introduces the required processing split of callbacks with are
really invoked from hard-irq context and those which are delayed until
the softirq timer tick. This has been done as quite a few them acquire
locks which need to sleep on PREEMPT_RT and must not be invoked in
hardirq context. We can not delay all of them since a few need to be
invoked hardirq context in order to work properly (NOHZ, scheduler, …).

Sebastian



             reply	other threads:[~2021-09-27 21:19 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-27 21:19 Sebastian Andrzej Siewior [this message]
2021-09-27 21:19 ` [PATCH 1/5] sched/rt: Annotate the RT balancing logic irqwork as IRQ_WORK_HARD_IRQ Sebastian Andrzej Siewior
2021-09-27 21:19 ` [PATCH 2/5] irq_work: Ensure that irq_work runs in in-IRQ context Sebastian Andrzej Siewior
2021-10-05 15:48   ` Sebastian Andrzej Siewior
2021-10-05 20:11     ` Peter Zijlstra
2021-09-27 21:19 ` [PATCH 3/5] irq_work: Allow irq_work_sync() to sleep if irq_work() no IRQ support Sebastian Andrzej Siewior
2021-09-27 21:19 ` [PATCH 4/5] irq_work: Handle some irq_work in SOFTIRQ on PREEMPT_RT Sebastian Andrzej Siewior
2021-09-30  9:07   ` Peter Zijlstra
2021-09-30  9:53     ` Sebastian Andrzej Siewior
2021-09-30 14:39       ` Peter Zijlstra
2021-09-30 16:38         ` Sebastian Andrzej Siewior
2021-10-01 10:32           ` Peter Zijlstra
2021-10-01 12:08             ` Sebastian Andrzej Siewior
2021-10-01 13:40               ` Peter Zijlstra
2021-09-27 21:19 ` [PATCH 5/5] irq_work: Also rcuwait for !IRQ_WORK_HARD_IRQ " Sebastian Andrzej Siewior

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