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Re: [PATCH 22/30] panic: Introduce the panic post-reboot notifier list
- To: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, Heiko Carstens <hca@xxxxxxxxxxxxx>, Sven Schnelle <svens@xxxxxxxxxxxxx>, Vasily Gorbik <gor@xxxxxxxxxxxxx>
- From: "Guilherme G. Piccoli" <gpiccoli@xxxxxxxxxx>
- Date: Mon, 9 May 2022 11:16:10 -0300
- Cc: linux-kernel@xxxxxxxxxxxxxxx, bcm-kernel-feedback-list@xxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-alpha@xxxxxxxxxxxxxxx, linux-edac@xxxxxxxxxxxxxxx, linux-hyperv@xxxxxxxxxxxxxxx, linux-leds@xxxxxxxxxxxxxxx, pmladek@xxxxxxxx, bhe@xxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, linux-pm@xxxxxxxxxxxxxxx, linux-remoteproc@xxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, kexec@xxxxxxxxxxxxxxxxxxx, linux-tegra@xxxxxxxxxxxxxxx, linux-um@xxxxxxxxxxxxxxxxxxx, linux-xtensa@xxxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, openipmi-developer@xxxxxxxxxxxxxxxxxxxxx, rcu@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, x86@xxxxxxxxxx, kernel-dev@xxxxxxxxxx, kernel@xxxxxxxxxxxx, halves@xxxxxxxxxxxxx, fabiomirmar@xxxxxxxxx, alejandro.j.jimenez@xxxxxxxxxx, andriy.shevchenko@xxxxxxxxxxxxxxx, arnd@xxxxxxxx, bp@xxxxxxxxx, corbet@xxxxxxx, d.hatayama@xxxxxxxxxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, dyoung@xxxxxxxxxx, feng.tang@xxxxxxxxx, gregkh@xxxxxxxxxxxxxxxxxxx, mikelley@xxxxxxxxxxxxx, hidehiro.kawai.ez@xxxxxxxxxxx, jgross@xxxxxxxx, john.ogness@xxxxxxxxxxxxx, keescook@xxxxxxxxxxxx, luto@xxxxxxxxxx, mhiramat@xxxxxxxxxx, mingo@xxxxxxxxxx, paulmck@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, rostedt@xxxxxxxxxxx, senozhatsky@xxxxxxxxxxxx, stern@xxxxxxxxxxxxxxxxxxx, tglx@xxxxxxxxxxxxx, vgoyal@xxxxxxxxxx, vkuznets@xxxxxxxxxx, will@xxxxxxxxxx
- Delivery-date: Mon, 09 May 2022 14:17:09 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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@xxxxxxxxxxxxx>
> Cc: Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>
> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
> Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
> Cc: Sven Schnelle <svens@xxxxxxxxxxxxx>
> Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
> Signed-off-by: Guilherme G. Piccoli <gpiccoli@xxxxxxxxxx>
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
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