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Date: Wed, 13 Jan 2016 11:44:53 +0100
From: Ingo Molnar <mingo@kernel.org>
To: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Will Deacon <will.deacon@arm.com>, Gilad Ben Yossef <giladb@ezchip.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Rik van Riel <riel@redhat.com>, Tejun Heo <tj@kernel.org>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        Christoph Lameter <cl@linux.com>,
        Viresh Kumar <viresh.kumar@linaro.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Andy Lutomirski <luto@amacapital.net>,
        Daniel Lezcano <daniel.lezcano@linaro.org>, linux-doc@vger.kernel.org,
        linux-api@vger.kernel.org, linux-kernel@vger.kernel.org,
        Mark Rutland <mark.rutland@arm.com>
Subject: Re: [PATCH v9 00/13] support "task_isolation" mode for nohz_full
Message-ID: <20160113104453.GB9854@gmail.com>
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 <20160112100708.GA15737@arm.com>
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* Chris Metcalf <cmetcalf@ezchip.com> wrote:

> (Adding Mark to cc's)
> 
> On 01/12/2016 05:07 AM, Will Deacon wrote:
> >On Mon, Jan 11, 2016 at 04:15:50PM -0500, Chris Metcalf wrote:
> >>Ping!  There has been no substantive feedback to this version of
> >>the patch in the week since I posted it, which optimistically suggests
> >>to me that people may be satisfied with it.  If that's true, Frederic,
> >>I assume this would be pulled into your tree?
> >>
> >>I have slightly updated the v9 patch series since this posting:
> >>
> >>[...]
> >>
> >>- Incorporated Mark Rutland's changes to convert arm64
> >>   assembly to C code instead of using my own version.
> >Please avoid queuing these patches -- the first is already in the arm64
> >queue for 4.5 and the second was found to introduce a substantial
> >performance regression on the syscall entry/exit path. I think Mark had
> >an updated version to address that, so it would be easier not to have
> >an old version sitting in some other queue!
> 
> I am not formally queueing them anywhere (like linux-next), though
> now that you mention it, that's a pretty good idea - I'll talk to Steven
> about that, assuming this merge window closes without the task
> isolation stuff going in.

NAK. Given the controversy, no way should this stuff go outside the primary trees 
it affects: the scheduler, timer, irq, etc. trees.

We can merge this up in -tip once everyone is happy... but as I said, don't expect 
many replies before and during the merge window.

Thanks,

	Ingo>