linux-kernel - Re: [PATCH 2/3] mm/page_table_check: Do WARN_ON instead of BUG

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Message-ID: <Yx4IEvkmAlcTIP6v@casper.infradead.org>
Date:   Sun, 11 Sep 2022 17:08:50 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Pasha Tatashin <pasha.tatashin@...een.com>
Cc:     akpm@...ux-foundation.org, corbet@....net, linux-mm@...ck.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        rick.p.edgecombe@...el.com
Subject: Re: [PATCH 2/3] mm/page_table_check: Do WARN_ON instead of BUG_ON by
 default

On Sun, Sep 11, 2022 at 09:59:22AM +0000, Pasha Tatashin wrote:
> Currently, page_table_check when detects errors panics kernel. Instead,
> print a warning, and panic only when specifically requested via kernel
> parameter:
> 
> 	page_table_check=panic

Why are the page table checks so special that they deserve their own
command line parameter?  Why shouldn't this be controlled by the usual
panic_on_warn option?