linux-kernel - Re: BUG: list_add corruption while doing migrate_swap -> balance

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Message-ID: <20220907083146.lp6eyv4txjbhuevl@suse.de>
Date:   Wed, 7 Sep 2022 09:31:46 +0100
From:   Mel Gorman <mgorman@...e.de>
To:     Kuyo Chang <kuyo.chang@...iatek.com>
Cc:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, bristot@...hat.com,
        linux-kernel@...r.kernel.org, wsd_upstream@...iatek.com,
        linux-mediatek@...ts.infradead.org, jing-ting.wu@...iatek.com,
        yt.chang@...iatek.com, jonathan.jmchen@...iatek.com
Subject: Re: BUG: list_add corruption while doing migrate_swap -> balance_push

On Tue, Sep 06, 2022 at 08:54:58PM +0800, Kuyo Chang wrote:
> Hi,
> 
> [Syndrome]
> A list_add corruption error at kernel-5.15, the log shows.
> list_add corruption. prev->next should be next (ffffff81a6f08ba0), but
> was 0000000000000000. (prev=ffffff81a6f05930).
> 

Is this a vanilla 5.15 kernel or modified? Does it happen on 5.19 or
6.0-rc4? Given that this appears to be a bug triggered by NUMA balancing
racing against memory hotplug, is there a reproducer for this?

-- 
Mel Gorman
SUSE Labs