From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Thu, 13 Dec 2018 15:53:21 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Sasha Levin <sashal@kernel.org>
Cc: Backport@sasha-vm, for@sasha-vm, cachelinestarvationonx86@sasha-vm,
	stable@vger.kernel.org, Will Deacon <will.deacon@arm.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Daniel Wagner <daniel.wagner@siemens.com>
Subject: Re: your mail
Message-ID: <20181213145321.GK5289@hirez.programming.kicks-ass.net>
References: <20181213140925.6179-1-bigeasy@linutronix.de>
 <20181213143336.GI2746@sasha-vm>
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On Thu, Dec 13, 2018 at 09:33:36AM -0500, Sasha Levin wrote:
> On Thu, Dec 13, 2018 at 03:09:15PM +0100, Sebastian Andrzej Siewior wrote:
> > Hi,
> > 
> > this is a backport of commit 7aa54be297655 ("locking/qspinlock, x86:
> > Provide liveness guarantee") for the v4.9 stable tree.
> > For the v4.4 tree the ARCH_USE_QUEUED_SPINLOCKS option got disabled on
> > x86.
> > For v4.9 it has been decided to do a minimal backport of the final fix
> > (including all its dependencies).
> > With this backport I can't reproduce the issue in the latest v4.9-RT
> > tree. I was able to boot (and use) an arm64 box with these patches so it
> > is not broken in an abvious way.
> 
> What about 4.14? I see that at least some of these patches are missing
> there.

4.14 can have a simpler backport indeed