linux-kernel - Re: Revert "powerpc: Do not call ppc_md.panic in fadump panic notifier"

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Message-Id: <3ysJcK4XMCz9sRW@ozlabs.org>
Date:   Thu,  7 Dec 2017 00:00:00 +1100 (AEDT)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     David Gibson <david@...son.dropbear.id.au>, npiggin@...il.com
Cc:     mahesh@...ux.vnet.ibm.com, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org,
        David Gibson <david@...son.dropbear.id.au>
Subject: Re: Revert "powerpc: Do not call ppc_md.panic in fadump panic notifier"

On Mon, 2017-12-04 at 05:27:25 UTC, David Gibson wrote:
> This reverts commit a3b2cb30f252b21a6f962e0dd107c8b897ca65e4.
> 
> The earlier patch tried to fix problems with panic on powerpc in
> certain circumstances, where some output from the generic panic code
> was being dropped.
> 
> Unfortunately, it breaks things worse in other circumstances.  In
> particular when running a PAPR guest, it will now attempt to reboot
> instead of informing the hypervisor (KVM or PowerVM) that the guest
> has crashed.  The crash notification is important to some
> virtualization management layers.
> 
> Since the circumstances in which the original patch helped are
> somewhat obscure, revert it for now until we figure out how to do it
> properly.
> 
> Signed-off-by: David Gibson <david@...son.dropbear.id.au>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/ab9dbf771ff9b6b7e814e759213ed0

cheers