linux-kernel - Re: [PATCH v5 4/4] mm,hwpoison: drop unneeded pcplist draining

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Message-ID: <20201014000606.GB6087@hori.linux.bs1.fc.nec.co.jp>
Date:   Wed, 14 Oct 2020 00:06:06 +0000
From:   HORIGUCHI NAOYA(堀口　直也) 
        <naoya.horiguchi@....com>
To:     Oscar Salvador <osalvador@...e.de>
CC:     "n-horiguchi@...jp.nec.com" <n-horiguchi@...jp.nec.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 4/4] mm,hwpoison: drop unneeded pcplist draining

On Tue, Oct 13, 2020 at 04:44:47PM +0200, Oscar Salvador wrote:
> memory_failure and soft_offline_path paths now drain pcplists by calling
> get_hwpoison_page.
> 
> memory_failure flags the page as HWPoison before, so that page cannot
> longer go into a pcplist, and soft_offline_page only flags a page as
> HWPoison if 1) we took the page off a buddy freelist 2) the page was
> in-use and we migrated it 3) was a clean pagecache.
> 
> Because of that, a page cannot longer be poisoned and be in a pcplist.
> 
> Signed-off-by: Oscar Salvador <osalvador@...e.de>

Thank you!

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