linux-kernel - Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804 assert_clock

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Message-ID: <20170131162500.GA14938@gmail.com>
Date:   Tue, 31 Jan 2017 17:25:00 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Mike Galbraith <efault@....de>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     Matt Fleming <matt@...eblueprint.co.uk>,
        lkml <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...e.hu>,
        Marc Zyngier <marc.zyngier@....com>
Subject: Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804
 assert_clock_updated.isra.62.part.63+0x25/0x27


* Mike Galbraith <efault@....de> wrote:

> On Tue, 2017-01-31 at 09:54 +0100, Ingo Molnar wrote:
> 
> > > Fast ain't gonna happen, 5bf728f02218 bricked.
> > 
> > :-/
> > 
> > Next point would be f9a42e0d58cf I suspect, to establish that Linus's latest 
> > kernel is fine. That means it's in one of the ~200 -tip commits - should be 
> > bisectable in 8-10 steps from that point on.
> 
> It bisected cleanly to the below, confirmed via quilt push/pop revert. 
>  According to the symptoms my box exhibits, patchlet needs to be
> twiddled to ensure that interrupts are enabled at _least_ once ;-)
> 
> 08d85f3ea99f1eeafc4e8507936190e86a16ee8c is the first bad commit
> commit 08d85f3ea99f1eeafc4e8507936190e86a16ee8c
> Author: Marc Zyngier <marc.zyngier@....com>
> Date:   Tue Jan 17 16:00:48 2017 +0000
> 
>     irqdomain: Avoid activating interrupts more than once

Fantastic, thanks Mike!

	Ingo