linux-kernel - Re: [v3 PATCH 3/3] mm: hwpoison: dump page for unhandlable page

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Message-ID: <20210824054914.GB1815685@hori.linux.bs1.fc.nec.co.jp>
Date:   Tue, 24 Aug 2021 05:49:14 +0000
From:   HORIGUCHI NAOYA(堀口　直也) 
        <naoya.horiguchi@....com>
To:     Yang Shi <shy828301@...il.com>
CC:     "osalvador@...e.de" <osalvador@...e.de>,
        "tdmackey@...tter.com" <tdmackey@...tter.com>,
        "david@...hat.com" <david@...hat.com>,
        "willy@...radead.org" <willy@...radead.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "corbet@....net" <corbet@....net>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [v3 PATCH 3/3] mm: hwpoison: dump page for unhandlable page

On Mon, Aug 23, 2021 at 07:09:46PM -0700, Yang Shi wrote:
> Currently just very simple message is shown for unhandlable page, e.g.
> non-LRU page, like:
> soft_offline: 0x1469f2: unknown non LRU page type 5ffff0000000000 ()
> 
> It is not very helpful for further debug, calling dump_page() could show
> more useful information.
> 
> Calling dump_page() in get_any_page() in order to not duplicate the call
> in a couple of different places.  It may be called with pcp disabled and
> holding memory hotplug lock, it should be not a big deal since hwpoison
> handler is not called very often.
> 
> Suggested-by: Matthew Wilcox <willy@...radead.org>
> Cc: Naoya Horiguchi <naoya.horiguchi@....com>
> Cc: Oscar Salvador <osalvador@...e.de>
> Signed-off-by: Yang Shi <shy828301@...il.com>

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

Thank you.