linux-kernel - Re: [linux-next][XFS][trinity] WARNING: CPU: 32 PID: 31369 at fs/iomap.c:993

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Message-ID: <8abed401-1634-760f-6543-4652fa495315@kernel.dk>
Date:   Mon, 18 Sep 2017 09:28:55 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Christoph Hellwig <hch@....de>,
        Abdul Haleem <abdhalee@...ux.vnet.ibm.com>
Cc:     linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        linux-xfs <linux-xfs@...r.kernel.org>,
        linux-next <linux-next@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        chandan <chandan@...ux.vnet.ibm.com>
Subject: Re: [linux-next][XFS][trinity] WARNING: CPU: 32 PID: 31369 at
 fs/iomap.c:993

On 09/18/2017 09:27 AM, Christoph Hellwig wrote:
> On Mon, Sep 18, 2017 at 08:26:05PM +0530, Abdul Haleem wrote:
>> Hi,
>>
>> A warning is triggered from:
>>
>> file fs/iomap.c in function iomap_dio_rw
>>
>>     if (ret)
>>         goto out_free_dio;
>>
>>     ret = invalidate_inode_pages2_range(mapping,
>>             start >> PAGE_SHIFT, end >> PAGE_SHIFT);
>>>>  WARN_ON_ONCE(ret);
>>     ret = 0;
>>
>>     inode_dio_begin(inode);
> 
> This is expected and an indication of a problematic workload - which
> may be triggered by a fuzzer.

If it's expected, why don't we kill the WARN_ON_ONCE()? I get it all
the time running xfstests as well.

-- 
Jens Axboe