linux-kernel - Re: [PATCH 22/30] panic: Introduce the panic post-reboot notifier list

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Message-ID: <7017c234-7c73-524a-11b6-fefdd5646f59@igalia.com>
Date:   Mon, 9 May 2022 11:16:10 -0300
From:   "Guilherme G. Piccoli" <gpiccoli@...lia.com>
To:     Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        "David S. Miller" <davem@...emloft.net>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>
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Subject: Re: [PATCH 22/30] panic: Introduce the panic post-reboot notifier
 list

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@...ux.ibm.com>
> Cc: Christian Borntraeger <borntraeger@...ux.ibm.com>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Heiko Carstens <hca@...ux.ibm.com>
> Cc: Sven Schnelle <svens@...ux.ibm.com>
> Cc: Vasily Gorbik <gor@...ux.ibm.com>
> Signed-off-by: Guilherme G. Piccoli <gpiccoli@...lia.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