linux-kernel - Re: [PATCH] x86/mm: fix __swp_entry_to

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Message-ID: <771234bd-0398-da70-5595-027bd6be5d65@suse.com>
Date:   Mon, 6 Mar 2023 15:25:59 +0100
From:   Juergen Gross <jgross@...e.com>
To:     Dave Hansen <dave.hansen@...el.com>, linux-kernel@...r.kernel.org,
        x86@...nel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] x86/mm: fix __swp_entry_to_pte() for Xen PV guests

On 06.03.23 15:08, Dave Hansen wrote:
> On 3/6/23 04:32, Juergen Gross wrote:
>> Fixes: 05289402d717 ("mm/debug_vm_pgtable: add tests validating arch helpers for core MM features")
>> Signed-off-by: Juergen Gross <jgross@...e.com>
> 
> This looks sane.  Any reason this shouldn't be cc:stable@?

It wasn't missed for several years now, and production kernels will
probably not have CONFIG_DEBUG_VM_PGTABLE set.

In the end I don't mind either way. It was just a bug I stumbled over
during development of my MTRR series (someone mentioned a problem and
I enabled said config option).


Juergen

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