linux-kernel - Memory hotplug softlock issue

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Message-ID: <20181114070909.GB2653@MiWiFi-R3L-srv>
Date:   Wed, 14 Nov 2018 15:09:09 +0800
From:   Baoquan He <bhe@...hat.com>
To:     linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org, mhocko@...e.com,
        akpm@...ux-foundation.org, aarcange@...hat.com, david@...hat.com
Subject: Memory hotplug softlock issue

Hi,

Tested memory hotplug on a bare metal system, hot removing always
trigger a lock. Usually need hot plug/unplug several times, then the hot
removing will hang there at the last block. Surely with memory pressure
added by executing "stress -m 200".

Will attach the log partly. Any idea or suggestion, appreciated. 

Thanks
Baoquan

View attachment "dmesg_1114_post.log" of type "text/plain" (273094 bytes)