linux-kernel - Re: [v5 PATCH 6/6] mm: hwpoison: handle non-anonymous THP correctly

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Message-ID: <CAPcxDJ5rgmyswPN5kL8-Mk2hk7MCjHXVy6pS50i=KQKzUGFHfA@mail.gmail.com>
Date:   Mon, 1 Nov 2021 12:38:44 -0700
From:   Jue Wang <juew@...gle.com>
To:     Yang Shi <shy828301@...il.com>, Hugh Dickins <hughd@...gle.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        kirill.shutemov@...ux.intel.com, linux-fsdevel@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        Linux MM <linux-mm@...ck.org>,
        HORIGUCHI NAOYA(堀口 直也) 
        <naoya.horiguchi@....com>, Oscar Salvador <osalvador@...e.de>,
        Peter Xu <peterx@...hat.com>,
        Matthew Wilcox <willy@...radead.org>
Subject: Re: [v5 PATCH 6/6] mm: hwpoison: handle non-anonymous THP correctly

A related bug but whose fix may belong to a separate series:

split_huge_page fails when invoked concurrently on the same THP page.

It's possible that multiple memory errors on the same THP get consumed
by multiple threads and come down to split_huge_page path easily.

Thanks,
-Jue