linux-kernel - [PATCH 0/5] irq_work: PREEMPT

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

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