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From:   Zi Yan <ziy@nvidia.com>
To:     Qian Cai <quic_qiancai@quicinc.com>
Cc:     David Hildenbrand <david@redhat.com>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org,
        virtualization@lists.linux-foundation.org,
        Vlastimil Babka <vbabka@suse.cz>,
        Mel Gorman <mgorman@techsingularity.net>,
        Eric Ren <renzhengeek@gmail.com>,
        Mike Rapoport <rppt@kernel.org>,
        Oscar Salvador <osalvador@suse.de>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH v11 0/6] Use pageblock_order for cma and alloc_contig_range alignment.
Date:   Wed, 27 Apr 2022 09:30:41 -0400
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On 27 Apr 2022, at 9:27, Qian Cai wrote:

> On Tue, Apr 26, 2022 at 05:38:58PM -0400, Zi Yan wrote:
>> Thanks. Do you mind attaching your config file? I cannot reproduce
>> the deadlock locally using my own config. I also see kmemleak_scan
>> in the dumped stack, so it must be something else in addition to
>> memory online/offline causing the issue.
>
> Actually, it is one of those *offline* operations, i.e.,
>
> echo 0 > /sys/devices/system/memory/memoryNNN/online
>
> looping forever which never finish after more than 2-hour.

Thank you for the detailed information. I am able to reproduce the
issue locally. I will update the patch once I fix the bug.

--
Best Regards,
Yan, Zi

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