Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Tue, 14 Apr 2020 16:35:14 +0800
From:   Jiaxun Yang <jiaxun.yang@flygoat.com>
To:     Sudeep Holla <sudeep.holla@arm.com>
Cc:     linux-mips@vger.kernel.org, dietmar.eggemann@arm.com,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        Huacai Chen <chenhc@lemote.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@redhat.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Robert Richter <rric@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Jason Cooper <jason@lakedaemon.net>,
        Marc Zyngier <maz@kernel.org>,
        Paul Burton <paulburton@kernel.org>,
        Allison Randal <allison@lohutok.net>,
        Enrico Weigelt <info@metux.net>,
        Kate Stewart <kstewart@linuxfoundation.org>,
        Vladimir Kondratiev <vladimir.kondratiev@intel.com>,
        Alexios Zavras <alexios.zavras@intel.com>,
        Paul Cercueil <paul@crapouillou.net>,
        Zhou Yanjie <zhouyanjie@zoho.com>,
        " =?GB18030?B?1tzn/L3c?= (Zhou Yanjie)" <zhouyanjie@wanyeetech.com>,
        YunQiang Su <syq@debian.org>, Arnd Bergmann <arnd@arndb.de>,
        Serge Semin <fancer.lancer@gmail.com>,
        Matt Redfearn <matt.redfearn@mips.com>,
        Richard Fontana <rfontana@redhat.com>,
        Steve Winslow <swinslow@gmail.com>,
        afzal mohammed <afzal.mohd.ma@gmail.com>,
        Peter Xu <peterx@redhat.com>,
        Kamal Dasu <kdasu.kdev@gmail.com>,
        Oleksij Rempel <linux@rempel-privat.de>,
        linux-kernel@vger.kernel.org,
        bcm-kernel-feedback-list@broadcom.com, oprofile-list@lists.sf.net,
        linux-pm@vger.kernel.org
Subject: Re: [PATCH v2 04/11] arch_topology: Reset all cpus in
 reset_cpu_topology
Message-ID: <20200414163514.00000100@flygoat.com>
In-Reply-To: <20200414082734.GC6459@bogus>
References: <20200412032123.3896114-1-jiaxun.yang@flygoat.com>
        <20200412032123.3896114-5-jiaxun.yang@flygoat.com>
        <20200414082734.GC6459@bogus>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Tue, 14 Apr 2020 09:27:34 +0100
Sudeep Holla <sudeep.holla@arm.com> wrote:

> On Sun, Apr 12, 2020 at 11:20:34AM +0800, Jiaxun Yang wrote:
> > For MIPS platform, when topology isn't probed by DeviceTree,
> > possible_cpu might be empty when calling init_cpu_topology,
> > that may result cpu_topology not fully reseted for all CPUs.
> > So here we can reset all cpus instead of possible cpus.
> >  
> 
> As I have told before adjust and make it default before this function
> gets called.

Hi,

That's really impossible under current MIPS code structure.

Another option would be prefill possible_cpu with all_cpu_mask before
calling topology_init, but that would make the code unnecessarily
complex.

Here simply reset the whole array won't cause any regression.

Thanks.
> 
--
Jiaxun Yang