linux-kernel - Re: [PATCH RFC] mm/ksm: Add recovery mechanism for memory failures

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Message-ID: <5e20b91c-c4e2-4450-b038-6afbdd3297e2@web.de>
Date: Mon, 13 Oct 2025 22:10:04 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: Longlong Xia <xialonglong@...inos.cn>, linux-mm@...ck.org,
 Miaohe Lin <linmiaohe@...wei.com>, Naoya Horiguchi <nao.horiguchi@...il.com>
Cc: Longlong Xia <xialonglong2025@....com>,
 LKML <linux-kernel@...r.kernel.org>,
 Andrew Morton <akpm@...ux-foundation.org>,
 David Hildenbrand <david@...hat.com>,
 Kefeng Wang <wangkefeng.wang@...wei.com>, xu xin <xu.xin16@....com.cn>
Subject: Re: [PATCH RFC] mm/ksm: Add recovery mechanism for memory failures

…
> This patch introduces …

See also:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.17#n94


…
> +++ b/mm/ksm.c
…
> +static bool ksm_recover_within_chain(struct ksm_stable_node *failing_node)
> +{
…
> +		struct vm_area_struct *vma;
> +
> +		mmap_read_lock(mm);
…
> +		}
> +
> +		mmap_read_unlock(mm);
…

Under which circumstances would you become interested to apply a statement
like “guard(mmap_read_lock)(mm);”?
https://elixir.bootlin.com/linux/v6.17.1/source/include/linux/mmap_lock.h#L483-L484

Regards,
Markus