Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <742d2a7e-efee-e212-178e-ba642ec94e2a@igalia.com>
Date:   Sun, 18 Sep 2022 11:10:47 -0300
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101
 Thunderbird/91.12.0
Subject: Re: [PATCH V3 08/11] EDAC/altera: Skip the panic notifier if kdump is
 loaded
Content-Language: en-US
To:     bhe@redhat.com, kexec@lists.infradead.org,
        Dinh Nguyen <dinguyen@kernel.org>,
        Tony Luck <tony.luck@intel.com>, linux-edac@vger.kernel.org,
        bp@alien8.de
Cc:     pmladek@suse.com, akpm@linux-foundation.org,
        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, 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, xuqiang36@huawei.com
References: <20220819221731.480795-1-gpiccoli@igalia.com>
 <20220819221731.480795-9-gpiccoli@igalia.com>
From:   "Guilherme G. Piccoli" <gpiccoli@igalia.com>
In-Reply-To: <20220819221731.480795-9-gpiccoli@igalia.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 19/08/2022 19:17, 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: Borislav Petkov <bp@alien8.de>
> Cc: Petr Mladek <pmladek@suse.com>
> Cc: Tony Luck <tony.luck@intel.com>
> Acked-by: Dinh Nguyen <dinguyen@kernel.org>
> Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
> 
> ---
> 
> V3:
> - added the ack tag from Dinh - thanks!
> - had a good discussion with Boris about that in V2 [0],
> hopefully we can continue and reach a consensus in this V3.
> [0] https://lore.kernel.org/lkml/46137c67-25b4-6657-33b7-cffdc7afc0d7@igalia.com/
> 
> V2:
> - new patch, based on the discussion in [1].
> [1] https://lore.kernel.org/lkml/62a63fc2-346f-f375-043a-fa21385279df@igalia.com/
> 
> [...]

Hi Dinh, Tony, Boris - sorry for the ping.

Appreciate reviews on this one - Dinh already ACKed the patch but Boris
raised some points in the past version [0], so any opinions or
discussions are welcome!

Thanks,


Guilherme


[0]
https://lore.kernel.org/lkml/46137c67-25b4-6657-33b7-cffdc7afc0d7@igalia.com/