linux-kernel - Re: [PATCH][RT][RFC] irq_work: Have non HARD

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Message-ID: <5589A94F.9010209@linutronix.de>
Date:	Tue, 23 Jun 2015 20:45:35 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Steven Rostedt <rostedt@...dmis.org>,
	Gary Robertson <gary.robertson@...aro.org>
CC:	Jan Kiszka <jan.kiszka@...mens.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-rt-users <linux-rt-users@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH][RT][RFC] irq_work: Have non HARD_IRQ irq work just run
 from ticks

On 06/23/2015 06:30 PM, Steven Rostedt wrote:
> I'd be sleeping better at night with a third queue. I'll write up a
> patch and post that as an RFC as well. This will at a minimum keep with
> the paradigm of mainline linux.

We had three queues. We are down to two and I think this is a good
thing. We only deal with FULL_NOHZ in hardirq context (looking at
v4.0-RT). Before that (FULL_NOHZ) everything was handled in softirq and
nobody was concerned (saw a problem).

It would be good if we would address a regression or a bug or something
like that.

> 
> -- Steve

Sebastian
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