linux-kernel - Re: [PATCH v2] mm: clean up hwpoison page cache page in fault path

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Message-ID: <2a881586-3f5e-c277-f373-a9014d631700@redhat.com>
Date:   Tue, 15 Feb 2022 12:22:48 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Rik van Riel <riel@...riel.com>, linux-kernel@...r.kernel.org
Cc:     kernel-team@...com, linux-mm@...ck.org,
        Miaohe Lin <linmiaohe@...wei.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...e.de>,
        Johannes Weiner <hannes@...xchg.org>,
        Matthew Wilcox <willy@...radead.org>
Subject: Re: [PATCH v2] mm: clean up hwpoison page cache page in fault path

On 13.02.22 03:37, Rik van Riel wrote:
> Sometimes the page offlining code can leave behind a hwpoisoned clean
> page cache page. This can lead to programs being killed over and over
> and over again as they fault in the hwpoisoned page, get killed, and
> then get re-spawned by whatever wanted to run them.

Hi Rik,

am I correct that you are only talking about soft offlining as triggered
from mm/memory-failure.c, not page offlining as in memory offlining
mm/memory_hotunplug.c ?

Maybe you can clarify that in the patch description, it made me nervous
for a second :)

-- 
Thanks,

David / dhildenb