linux-kernel - Re: [PATCH RT] time/hrtimer: disable that mode check

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Date:   Wed, 13 Dec 2017 15:22:57 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     linux-rt-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        tglx@...utronix.de, Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH RT] time/hrtimer: disable that mode check

On 2017-12-13 15:19:19 [+0100], Peter Zijlstra wrote:
> On Wed, Dec 13, 2017 at 02:58:35PM +0100, Sebastian Andrzej Siewior wrote:
> > On -RT we push all timers by default into the soft-mode. The
> > "start/update" code does not use that SOFT bit so we always see that
> > warning.
> 
> Not _all_ timers I hope? There's a few the scheduler and perf use that
> really should stay in hardirq context.
That is correct, a few ones remain in the hardirq context.

Sebastian