linux-kernel - Re: [PATCH] time/tick-broadcast: Fix tick_broadcast

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Message-ID: <20190621122927.GV3402@hirez.programming.kicks-ass.net>
Date:   Fri, 21 Jun 2019 14:29:27 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Paul E. McKenney" <paulmck@...ux.ibm.com>
Cc:     linux-kernel@...r.kernel.org, mingo@...hat.com,
        frederic@...nel.org, tglx@...utronix.de
Subject: Re: [PATCH] time/tick-broadcast: Fix tick_broadcast_offline()
 lockdep complaint

On Fri, Jun 21, 2019 at 05:16:30AM -0700, Paul E. McKenney wrote:
> A pair of full hangs at boot (TASKS03 and TREE04), no console output
> whatsoever.  Not sure how these changes could cause that, but suspicion
> falls on sched_tick_offload_init().  Though even that is a bit strange
> because if so, why didn't TREE01 and TREE07 also hang?  Again, looking
> into it.

Pesky details ;-)