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Re: xfs_nondir_ilock_class lockdep warning

To: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: xfs_nondir_ilock_class lockdep warning
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Thu, 11 Feb 2016 08:44:52 +1100
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <201602101953.HEB13075.HFLOOFQVStOJFM@xxxxxxxxxxxxxxxxxxx>
References: <201602101953.HEB13075.HFLOOFQVStOJFM@xxxxxxxxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Wed, Feb 10, 2016 at 07:53:21PM +0900, Tetsuo Handa wrote:
> Hello.
> 
> I'm getting xfs_nondir_ilock_class lockdep warning.
> I reported this because google hits little.
> Please reply if this is not a known false positive.

False positive. The XFS inode memory reclaim code will never try to
reclaim (and hence lock) an inode with an active reference. Hence no
deadlock is possible.

-Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx

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