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Date:   Wed, 13 Oct 2021 17:37:34 -0400
From:   Steven Rostedt <rostedt@goodmis.org>
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Borislav Petkov <bp@alien8.de>,
        LKML <linux-kernel@vger.kernel.org>,
        Gavin Shan <gshan@redhat.com>,
        Anshuman Khandual <anshuman.khandual@arm.com>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Gerald Schaefer <gerald.schaefer@linux.ibm.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        "the arch/x86 maintainers" <x86@kernel.org>
Subject: Re: [BUG] WARNING: CPU: 3 PID: 1 at mm/debug_vm_pgtable.c:493
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On Tue, 12 Oct 2021 12:15:40 -0700
Linus Torvalds <torvalds@linux-foundation.org> wrote:

> You might add some debugging to the x86 pud_set_huge() function,
> something like the attached (obviously entirely untested) patch.

Well, I've applied this patch, and have yet to reproduce it.

So, I added this to my "apply before testing" patch set, and if it triggers
again, I should have more info.

-- Steve