Subject: Re: [XFS][trinity] WARNING: CPU: 32 PID: 31369 at fs/iomap.c:993

From: Jens Axboe <[email-masked]>
Date: Mon, 18 Sep 2017 09:28:55 -0600

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