linux-kernel - Re: [loop] 322c4293ec: xfstests.xfs.049.fail

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Message-ID: <dd707dfd-6421-b1df-4820-e30787b84181@i-love.sakura.ne.jp>
Date:   Mon, 20 Dec 2021 00:45:46 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:     kernel test robot <oliver.sang@...el.com>
Cc:     Jens Axboe <axboe@...nel.dk>,
        syzbot <syzbot+643e4ce4b6ad1347d372@...kaller.appspotmail.com>,
        Christoph Hellwig <hch@...radead.org>, Jan Kara <jack@...e.cz>,
        Christoph Hellwig <hch@....de>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        lkp@...ts.01.org, lkp@...el.com
Subject: Re: [loop] 322c4293ec: xfstests.xfs.049.fail

On 2021/12/20 0:09, kernel test robot wrote:
>     @@ -13,3 +13,5 @@
>      --- clean
>      --- umount ext2 on xfs
>      --- umount xfs
>     +!!! umount xfs failed
>     +(see /lkp/benchmarks/xfstests/results//xfs/049.full for details)
>     ...
>     (Run 'diff -u /lkp/benchmarks/xfstests/tests/xfs/049.out /lkp/benchmarks/xfstests/results//xfs/049.out.bad'  to see the entire diff)

Yes, we know this race condition can happen.

https://lkml.kernel.org/r/16c7d304-60ef-103f-1b2c-8592b48f47c6@i-love.sakura.ne.jp
https://lkml.kernel.org/r/YaYfu0H2k0PSQL6W@infradead.org

Should we try to wait for autoclear operation to complete?