linux-kernel - Re: [PATCH] kernel: add panic_on

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Message-ID: <60e5c03f-ab34-8095-e2f3-e0ee6a1fb9c1@infradead.org>
Date:   Wed, 6 May 2020 17:20:16 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Rafael Aquini <aquini@...hat.com>, linux-kernel@...r.kernel.org
Cc:     linux-doc@...r.kernel.org, kexec@...ts.infradead.org,
        linux-fsdevel@...r.kernel.org, dyoung@...hat.com, bhe@...hat.com,
        corbet@....net, mcgrof@...nel.org, keescook@...omium.org,
        akpm@...ux-foundation.org, cai@....pw
Subject: Re: [PATCH] kernel: add panic_on_taint

On 5/6/20 3:28 PM, Rafael Aquini wrote:
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 7bc83f3d9bdf..75c02c1841b2 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -3404,6 +3404,9 @@
>  	panic_on_warn	panic() instead of WARN().  Useful to cause kdump
>  			on a WARN().
>  
> +	panic_on_taint	panic() when the kernel gets tainted, if the taint
> +			flag being set matches with the assigned bitmask.
> +

Where is the bitmask assigned?

I.e., maybe this text should be more like:

	panic_on_taint=<bitmask>
and then the bits are explained.  See e.g. panic= and panic_print=
in this same file.


>  	crash_kexec_post_notifiers
>  			Run kdump after running panic-notifiers and dumping
>  			kmsg. This only for the users who doubt kdump always


-- 
~Randy