From: Greg KH <gregkh@linuxfoundation.org>
To: luofei <luofei@unicloud.com>
Cc: stable@vger.kernel.org, tony.luck@intel.com, bp@alien8.de,
tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
x86@kernel.org, linux-edac@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86/mm, mm/hwpoison: Fix the unmap kernel 1:1 pages check condition
Date: Wed, 9 Feb 2022 14:11:47 +0100 [thread overview]
Message-ID: <YgO9kyM6C4HResiG@kroah.com> (raw)
In-Reply-To: <20220208032028.852302-1-luofei@unicloud.com>
On Mon, Feb 07, 2022 at 10:20:28PM -0500, luofei wrote:
> [ Upstream commit fd0e786d9d09024f67bd71ec094b110237dc3840 ]
>
> This commit solves the problem of unmap kernel 1:1 pages
> unconditionally, it appears in Linus's tree 4.16 and later
> versions, and is backported to 4.14.x and 4.15.x stable branches.
>
> But the backported patch has its logic reversed when calling
> memory_failure() to determine whether it needs to unmap the
> kernel page. Only when memory_failure() returns successfully,
> the kernel page can be unmapped.
>
> Signed-off-by: luofei <luofei@unicloud.com>
> Cc: stable@vger.kernel.org #v4.14.x
> Cc: stable@vger.kernel.org #v4.15.x
> ---
> arch/x86/kernel/cpu/mcheck/mce.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Thanks, now queued up.
greg k-h
prev parent reply other threads:[~2022-02-09 13:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-08 3:20 [PATCH] x86/mm, mm/hwpoison: Fix the unmap kernel 1:1 pages check condition luofei
2022-02-09 13:11 ` Greg KH [this message]
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