linux-kernel - Re: [PATCH v11 0/6] Use pageblock_order for cma and alloc_contig

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Message-ID: <20220427132720.GC71@qian>
Date:   Wed, 27 Apr 2022 09:27:20 -0400
From:   Qian Cai <quic_qiancai@...cinc.com>
To:     Zi Yan <ziy@...dia.com>
CC:     David Hildenbrand <david@...hat.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>,
        <virtualization@...ts.linux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Eric Ren <renzhengeek@...il.com>,
        Mike Rapoport <rppt@...nel.org>,
        "Oscar Salvador" <osalvador@...e.de>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v11 0/6] Use pageblock_order for cma and
 alloc_contig_range alignment.

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.