linux-kernel - Re: [Qestion] UCE on pud-sized hugepage lead to kernel panic on lts5.10

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Date:   Wed, 14 Dec 2022 09:52:11 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     mawupeng <mawupeng1@...wei.com>
Cc:     naoya.horiguchi@....com, catalin.marinas@....com,
        akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [Qestion] UCE on pud-sized hugepage lead to kernel panic on
 lts5.10

On Wed, Dec 14, 2022 at 09:33:10AM +0800, mawupeng wrote:
> On current arm64 stable 5.10(v5.10.158). If a UCE happnes pud-sized
> hugepage, kernel will panic since current memory failure can not handle
> this kind of memory failure since commit 31286a8484a8 ("mm: hwpoison:
> disable memory error handling on 1GB hugepage")
> 
> The latest kernel(v6.0) can handle this UCE since commit 6f4614886baa ("mm,
> hwpoison: enable memory error handling on 1GB hugepage"). We are trying to
> backport this patchset to stable 5.10, however too many other patches
> should be backport since there are huge difference between 5.10 and 6.0.
> The full patch list will be shown at the end of this mail.
> 
> We do not think backport all of these patches is doable for stable 5.10. Is
> there any better way to fix this problem.

Please just upgrade to 6.0 (or 6.1 as 6.0 will be end-of-life in a week
or so).  That is the simplest and easiest way to resolve the issue,
right?

Or what about 5.15.y?

thanks,

greg k-h