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Date:   Fri, 18 Oct 2019 10:24:59 +0200
From:   Michal Hocko <mhocko@kernel.org>
To:     David Hildenbrand <david@redhat.com>
Cc:     Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>, Qian Cai <cai@lca.pw>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        Mike Kravetz <mike.kravetz@oracle.com>
Subject: Re: memory offline infinite loop after soft offline
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On Fri 18-10-19 10:13:36, David Hildenbrand wrote:
[...]
> However, if the compound page spans multiple pageblocks

Although hugetlb pages spanning pageblocks are possible this shouldn't
matter in__test_page_isolated_in_pageblock because this function doesn't
really operate on pageblocks as the name suggests.  It is simply
traversing all valid RAM ranges (see walk_system_ram_range).
-- 
Michal Hocko
SUSE Labs