Message-ID: <1478546280.14601.31.camel@redhat.com>
Subject: Re: task isolation discussion at Linux Plumbers
From: Rik van Riel <riel@redhat.com>
To: Will Deacon <will.deacon@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
        Chris Metcalf <cmetcalf@mellanox.com>,
        Gilad Ben Yossef <giladb@mellanox.com>,
        Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Andrew Morton <akpm@linux-foundation.org>, Tejun Heo <tj@kernel.org>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        "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>,
        Francis Giraldeau <francis.giraldeau@gmail.com>,
        Andi Kleen <andi@firstfloor.org>, Arnd Bergmann <arnd@arndb.de>,
        linux-kernel@vger.kernel.org
Date: Mon, 07 Nov 2016 14:18:00 -0500
In-Reply-To: <20161107191624.GL20591@arm.com>
References: <1471382376-5443-1-git-send-email-cmetcalf@mellanox.com>
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         <alpine.DEB.2.20.1611071933430.3501@nanos>
         <1478545933.14601.30.camel@redhat.com> <20161107191624.GL20591@arm.com>
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On Mon, 2016-11-07 at 19:16 +0000, Will Deacon wrote:
> On Mon, Nov 07, 2016 at 02:12:13PM -0500, Rik van Riel wrote:
> >=20
> > On Mon, 2016-11-07 at 19:36 +0100, Thomas Gleixner wrote:
> > >=20
> > > On Mon, 7 Nov 2016, Thomas Gleixner wrote:
> > > >=20
> > > >=20
> > > > >=20
> > > > >=20
> > > > > =3D=3D Missing oneshot_stopped callbacks =3D=3D
> > > > >=20
> > > > > I raised the issue that various clock_event_device sources
> > > > > don't
> > > > > always support oneshot_stopped, which can cause an additional
> > > > > final interrupt to occur after the timer infrastructure
> > > > > believes
> > > > > the
> > > > > interrupt has been stopped.=C2=A0=C2=A0I have patches to fix this=
 for
> > > > > tile
> > > > > and
> > > > > arm64 in my patch series; Thomas volunteered to look at
> > > > > adding
> > > > > equivalent support for x86.
> > > >=20
> > > > Right.
> > >=20
> > > Untested patch below should fix that.
> > > =C2=A0
> >=20
> > That whitespace cleanup looks awesome, but I am not
> > optimistic about its chances to bring about functional
> > change.
> >=20
> > What am I overlooking?
>=20
> It hooks up .set_state_oneshot_stopped?

Gah, indeed. Never mind :)

--=20
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