linux-kernel - Re: shrink_active_list/try_to_release_page bug? (was Re: xfs trace in 4.4.2 / also in 4.3.3 WARNING fs/xfs/xfs_aops.c:1232 xfs_vm

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Date:	Tue, 31 May 2016 10:03:41 +0200
From:	Stefan Priebe - Profihost AG <s.priebe@...fihost.ag>
To:	Dave Chinner <david@...morbit.com>
Cc:	Minchan Kim <minchan@...nel.org>,
	Brian Foster <bfoster@...hat.com>,
	"xfs@....sgi.com" <xfs@....sgi.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: shrink_active_list/try_to_release_page bug? (was Re: xfs trace in
 4.4.2 / also in 4.3.3 WARNING fs/xfs/xfs_aops.c:1232 xfs_vm_releasepage)

Am 31.05.2016 um 09:31 schrieb Dave Chinner:
> On Tue, May 31, 2016 at 08:11:42AM +0200, Stefan Priebe - Profihost AG wrote:
>>> I'm half tempted at this point to mostly ignore this mm/ behavour
>>> because we are moving down the path of removing buffer heads from
>>> XFS. That will require us to do different things in ->releasepage
>>> and so just skipping dirty pages in the XFS code is the best thing
>>> to do....
>>
>> does this change anything i should test? Or is 4.6 still the way to go?
> 
> Doesn't matter now - the warning will still be there on 4.6. I think
> you can simply ignore it as the XFS code appears to be handling the
> dirty page that is being passed to it correctly. We'll work out what
> needs to be done to get rid of the warning for this case, wether it
> be a mm/ change or an XFS change.

So is it OK to remove the WARN_ONCE in kernel code? So i don't get
alarms from our monitoring systems for the trace.

Stefan

> 
> Cheers,
> 
> Dave.
>