linux-kernel - Re: [PATCH v2 RT 3.18] irq_work: Provide a soft-irq based queue

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Message-ID: <20150514195811.GJ13442@linutronix.de>
Date:	Thu, 14 May 2015 21:58:11 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Jan Kiszka <jan.kiszka@...mens.com>
Cc:	RT <linux-rt-users@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Mike Galbraith <umgwanakikbuti@...il.com>
Subject: Re: [PATCH v2 RT 3.18] irq_work: Provide a soft-irq based queue

* Jan Kiszka | 2015-04-23 09:35:59 [+0200]:

>Instead of turning all irq_work requests into lazy ones on -rt, just
>move their execution from hard into soft-irq context.
>
>This resolves deadlocks of ftrace which will queue work from arbitrary
>contexts, including those that have locks held that are needed for
>raising a soft-irq.
>
>Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
Applied

Sebastian
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