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Date:   Sun, 7 Aug 2022 12:48:36 -0300
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Subject: Re: [PATCH v2 10/13] EDAC/altera: Skip the panic notifier if kdump is
 loaded
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To:     kexec@lists.infradead.org, Tony Luck <tony.luck@intel.com>,
        Dinh Nguyen <dinguyen@kernel.org>, linux-edac@vger.kernel.org
Cc:     akpm@linux-foundation.org, bhe@redhat.com,
        linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
        netdev@vger.kernel.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, pmladek@suse.com
References: <20220719195325.402745-1-gpiccoli@igalia.com>
 <20220719195325.402745-11-gpiccoli@igalia.com>
From:   "Guilherme G. Piccoli" <gpiccoli@igalia.com>
In-Reply-To: <20220719195325.402745-11-gpiccoli@igalia.com>
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On 19/07/2022 16:53, Guilherme G. Piccoli wrote:
> The altera_edac panic notifier performs some data collection with
> regards errors detected; such code relies in the regmap layer to
> perform reads/writes, so the code is abstracted and there is some
> risk level to execute that, since the panic path runs in atomic
> context, with interrupts/preemption and secondary CPUs disabled.
> 
> Users want the information collected in this panic notifier though,
> so in order to balance the risk/benefit, let's skip the altera panic
> notifier if kdump is loaded. While at it, remove a useless header
> and encompass a macro inside the sole ifdef block it is used.
> 
> Cc: Dinh Nguyen <dinguyen@kernel.org>
> Cc: Petr Mladek <pmladek@suse.com>
> Cc: Tony Luck <tony.luck@intel.com>
> Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
> 
> ---
> 
> V2:
> - new patch, based on the discussion in [0].
> [0] https://lore.kernel.org/lkml/62a63fc2-346f-f375-043a-fa21385279df@igalia.com/
> 
>  drivers/edac/altera_edac.c | 16 ++++++++++++----
>  1 file changed, 12 insertions(+), 4 deletions(-)
> [...]

Hey Tony / Dinh, do you think this patch is good, based on the
discussion we had [0] last iteration?

Thanks in advance,


Guilherme


[0]
https://lore.kernel.org/lkml/599b72f6-76a4-8e6d-5432-56fb1ffd7e0b@igalia.com/