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Date: Mon, 25 Mar 2024 13:29:09 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Baoquan He <bhe@...hat.com>
Cc: kexec@...ts.infradead.org, mingo@...nel.org,
 linux-kernel@...r.kernel.org, x86@...nel.org, chenhuacai@...ngson.cn,
 dyoung@...hat.com, jbohac@...e.cz, lihuafei1@...wei.com,
 chenhaixiang3@...wei.com
Subject: Re: [PATCH v2] crash: use macro to add crashk_res into iomem early
 for specific arch

On Mon, 25 Mar 2024 09:50:50 +0800 Baoquan He <bhe@...hat.com> wrote:

> There are regression reports[1][2] that crashkernel region on x86_64 can't
> be added into iomem tree sometime. This causes the later failure of kdump
> loading.

So I think a cc:stable is needed.

> This happened after commit 4a693ce65b18 ("kdump: defer the insertion of
> crashkernel resources") was merged.
> 
> Even though, these reported issues are proved to be related to other
> component, they are just exposed after above commmit applied, I still
> would like to keep crashk_res and crashk_low_res being added into iomem
> early as before because the early adding has been always there on x86_64
> and working very well. For safety of kdump, Let's change it back.

I'll use 4a693ce65b18 as the Fixes: target, since there is no
"Exposed-by-non-buggy-patch:" tag.  To tell the -stable tree
maintainers how far back in history this should be backported.



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