linux-kernel - Re: [PATCH] x86/irq: Cure live lock in irq_force_complete

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Message-ID: <alpine.DEB.2.11.1603122054350.3657@nanos>
Date:	Sat, 12 Mar 2016 20:56:05 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Ingo Molnar <mingo@...nel.org>
cc:	LKML <linux-kernel@...r.kernel.org>,
	Harry Junior <harryjr@...look.fr>,
	Tony Luck <tony.luck@...el.com>, x86@...nel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Joe Lawrence <joe.lawrence@...atus.com>,
	Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH] x86/irq: Cure live lock in irq_force_complete_move()

On Sat, 12 Mar 2016, Ingo Molnar wrote:
> Cool fix!! :-)

Not so cool, as it's not correct. Working on it ...
 
> How much time did it take for you to figure out this one?? ...

Harry provided backtraces of all cpus, so figuring out what was wrong was not
the problem, but wrapping the head around a fix still is one :)