linux-kernel - Re: [PATCH 4/6] mm, hwpoison: avoid unneeded page_mapped_in_vma() overhead in collect_procs

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Message-ID: <20220905052450.GD1355682@hori.linux.bs1.fc.nec.co.jp>
Date:   Mon, 5 Sep 2022 05:24:51 +0000
From:   HORIGUCHI NAOYA(堀口　直也) 
        <naoya.horiguchi@....com>
To:     Miaohe Lin <linmiaohe@...wei.com>
CC:     "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/6] mm, hwpoison: avoid unneeded page_mapped_in_vma()
 overhead in collect_procs_anon()

On Tue, Aug 30, 2022 at 08:36:02PM +0800, Miaohe Lin wrote:
> If vma->vm_mm != t->mm, there's no need to call page_mapped_in_vma() as
> add_to_kill() won't be called in this case. Move up the mm check to avoid
> possible unneeded calling to page_mapped_in_vma().
> 
> Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>

Acked-by: Naoya Horiguchi <naoya.horiguchi@....com>