linux-kernel - Re: [PATCH v4 2/3] mm: handle poisoning of pfn without struct pages

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Message-Id: <20251103185226.fea151c58ce7077b11b106aa@linux-foundation.org>
Date: Mon, 3 Nov 2025 18:52:26 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Michal Hocko <mhocko@...e.com>
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Subject: Re: [PATCH v4 2/3] mm: handle poisoning of pfn without struct pages

On Mon, 3 Nov 2025 19:22:09 +0100 Michal Hocko <mhocko@...e.com> wrote:

> > Hi Michal, I am trying to replicate what is being done today for non-PFNMAP
> > memory failure in __add_to_kill
> > (https://github.com/torvalds/linux/blob/master/mm/memory-failure.c#L376).
> > For this series, I am inclined to keep it uniform.
> 
> Unless there is a very good reason for this code then I would rather not
> rely on an atomic allocation. This just makes the behavior hard to
> predict

I don't think this was addressed in the v5 series.

Yes please, anything we can do to avoid GFP_ATOMIC makes the kernel
more reliable.