Received-SPF: softfail (google.com: domain of transitioning linux-kernel-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) client-ip=23.128.96.19;
Message-ID: <7017c234-7c73-524a-11b6-fefdd5646f59@igalia.com>
Date:   Mon, 9 May 2022 11:16:10 -0300
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101
 Thunderbird/91.8.1
Subject: Re: [PATCH 22/30] panic: Introduce the panic post-reboot notifier
 list
Content-Language: en-US
To:     Alexander Gordeev <agordeev@linux.ibm.com>,
        Christian Borntraeger <borntraeger@linux.ibm.com>,
        "David S. Miller" <davem@davemloft.net>,
        Heiko Carstens <hca@linux.ibm.com>,
        Sven Schnelle <svens@linux.ibm.com>,
        Vasily Gorbik <gor@linux.ibm.com>
Cc:     linux-kernel@vger.kernel.org,
        bcm-kernel-feedback-list@broadcom.com,
        linuxppc-dev@lists.ozlabs.org, linux-alpha@vger.kernel.org,
        linux-edac@vger.kernel.org, linux-hyperv@vger.kernel.org,
        linux-leds@vger.kernel.org, pmladek@suse.com, bhe@redhat.com,
        akpm@linux-foundation.org, linux-mips@vger.kernel.org,
        linux-parisc@vger.kernel.org, linux-pm@vger.kernel.org,
        linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org,
        kexec@lists.infradead.org, linux-tegra@vger.kernel.org,
        linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org,
        netdev@vger.kernel.org, openipmi-developer@lists.sourceforge.net,
        rcu@vger.kernel.org, sparclinux@vger.kernel.org,
        xen-devel@lists.xenproject.org, x86@kernel.org,
        kernel-dev@igalia.com, kernel@gpiccoli.net, halves@canonical.com,
        fabiomirmar@gmail.com, alejandro.j.jimenez@oracle.com,
        andriy.shevchenko@linux.intel.com, arnd@arndb.de, bp@alien8.de,
        corbet@lwn.net, d.hatayama@jp.fujitsu.com,
        dave.hansen@linux.intel.com, dyoung@redhat.com,
        feng.tang@intel.com, gregkh@linuxfoundation.org,
        mikelley@microsoft.com, hidehiro.kawai.ez@hitachi.com,
        jgross@suse.com, john.ogness@linutronix.de, keescook@chromium.org,
        luto@kernel.org, mhiramat@kernel.org, mingo@redhat.com,
        paulmck@kernel.org, peterz@infradead.org, rostedt@goodmis.org,
        senozhatsky@chromium.org, stern@rowland.harvard.edu,
        tglx@linutronix.de, vgoyal@redhat.com, vkuznets@redhat.com,
        will@kernel.org
References: <20220427224924.592546-1-gpiccoli@igalia.com>
 <20220427224924.592546-23-gpiccoli@igalia.com>
From:   "Guilherme G. Piccoli" <gpiccoli@igalia.com>
In-Reply-To: <20220427224924.592546-23-gpiccoli@igalia.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 27/04/2022 19:49, Guilherme G. Piccoli wrote:
> Currently we have 3 notifier lists in the panic path, which will
> be wired in a way to allow the notifier callbacks to run in
> different moments at panic time, in a subsequent patch.
> 
> But there is also an odd set of architecture calls hardcoded in
> the end of panic path, after the restart machinery. They're
> responsible for late time tunings / events, like enabling a stop
> button (Sparc) or effectively stopping the machine (s390).
> 
> This patch introduces yet another notifier list to offer the
> architectures a way to add callbacks in such late moment on
> panic path without the need of ifdefs / hardcoded approaches.
> 
> Cc: Alexander Gordeev <agordeev@linux.ibm.com>
> Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Heiko Carstens <hca@linux.ibm.com>
> Cc: Sven Schnelle <svens@linux.ibm.com>
> Cc: Vasily Gorbik <gor@linux.ibm.com>
> Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>

Hey S390/SPARC folks, sorry for the ping!

Any reviews on this V1 would be greatly appreciated, I'm working on V2
and seeking feedback in the non-reviewed patches.

Thanks in advance,


Guilherme