Message-ID: <85ac7c9ccb578155738f2dfdfb74904e677f0141.camel@gmx.de>
Subject: Re: [PATCH v2 2/5] preempt/dynamic: Introduce preempt mode accessors
From:   Mike Galbraith <efault@gmx.de>
To:     Valentin Schneider <valentin.schneider@arm.com>,
        Marco Elver <elver@google.com>
Cc:     linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com,
        linuxppc-dev@lists.ozlabs.org, linux-kbuild@vger.kernel.org,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@kernel.org>,
        Frederic Weisbecker <frederic@kernel.org>,
        Dmitry Vyukov <dvyukov@google.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Masahiro Yamada <masahiroy@kernel.org>,
        Michal Marek <michal.lkml@markovi.net>,
        Nick Desaulniers <ndesaulniers@google.com>
Date:   Thu, 11 Nov 2021 12:09:58 +0100
In-Reply-To: <8735o3rmej.mognet@arm.com>
References: <20211110202448.4054153-1-valentin.schneider@arm.com>
         <20211110202448.4054153-3-valentin.schneider@arm.com>
         <a7c704c2ae77e430d7f0657c5db664f877263830.camel@gmx.de>
         <803a905890530ea1b86db6ac45bd1fd940cf0ac3.camel@gmx.de>
         <a7febd8825a2ab99bd1999664c6d4aa618b49442.camel@gmx.de>
         <CANpmjNPeRwupeg=S8yGGUracoehSUbS-Fkfb8juv5mYN36uiqg@mail.gmail.com>
         <26fd47db11763a9c79662a66eed2dbdbcbedaa8a.camel@gmx.de>
         <8735o3rmej.mognet@arm.com>
Content-Type: text/plain; charset="UTF-8"
User-Agent: Evolution 3.42.0 
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
Precedence: bulk

On Thu, 2021-11-11 at 10:56 +0000, Valentin Schneider wrote:
> On 11/11/21 11:32, Mike Galbraith wrote:
> > On Thu, 2021-11-11 at 10:36 +0100, Marco Elver wrote:
> > > I guess the question is if is_preempt_full() should be true also if
> > > is_preempt_rt() is true?
> >
> > That's what CONFIG_PREEMPTION is.=C2=A0 More could follow, but it was =
added
> > to allow multiple models to say "preemptible".
> >
>
> That's what I was gonna say, but you can have CONFIG_PREEMPTION while be=
ing
> is_preempt_none() due to PREEMPT_DYNAMIC...

Ah, right.. this is gonna take some getting used to.

	-Mike