linux-kernel - Re: [PATCH] mce: fix missing stack-dumping in mce

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Message-ID: <1e1bfb2a-5e20-626f-97f7-5ff4cf3d4d51@huawei.com>
Date:   Mon, 9 Jan 2023 10:16:04 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     "Luck, Tony" <tony.luck@...el.com>
CC:     "x86@...nel.org" <x86@...nel.org>, "hpa@...or.com" <hpa@...or.com>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH] mce: fix missing stack-dumping in mce_panic()

On 2023/1/9 1:54, Luck, Tony wrote:
>> As a first step, let's change the current behavior of no stack dumps first? And then,
>> we could try to achieve #1 preference if possible.
> 
> Ok. Repost the patch that fixes things for an oops dump for every mce_panic().

Do you mean make every call site of mce_panic() does a successful oops dump? I think
this patch will have achieved that. Or do I miss-read your comment?

> 
> Maybe then I can look at some way to suppress the oops dump for the "useless"
> cases? Or perhaps at least add an extra message that stack dumps from arbitrary
> machine checks are rarely useful.

IMHO the user will always expect a stack dump when system panic. I'm afraid that if these
"useless" cases are eliminated, it will cause user confused and trying to find what eats
the stack dump?

Thanks,
Miaohe Lin