linux-kernel - Re: [PATCH 2/2] mm: ksm: Support hwpoison for ksm page

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Date:   Thu, 13 Apr 2023 17:30:25 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Longlong Xia <xialonglong1@...wei.com>,
        <akpm@...ux-foundation.org>, <naoya.horiguchi@....com>
CC:     <linmiaohe@...wei.com>, <sunnanyong@...wei.com>,
        <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>
Subject: Re: [PATCH 2/2] mm: ksm: Support hwpoison for ksm page



On 2023/3/30 15:45, Longlong Xia wrote:
> hwpoison_user_mappings() is updated to support ksm pages, and add
> collect_procs_ksm() to collect processes when the error hit an ksm
> page. The difference from collect_procs_anon() is that it also needs
> to traverse the rmap-item list on the stable node of the ksm page.
> At the same time, add_to_kill_ksm() is added to handle ksm pages. And
> task_in_to_kill_list() is added to avoid duplicate addition of tsk to
> the to_kill list. This is because when scanning the list, if the pages
> that make up the ksm page all come from the same process, they may be
> added repeatedly.
> 
Reviewed-by: Kefeng Wang <wangkefeng.wang@...wei.com>