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From: Matthew Wilcox <willy@infradead.org>
To: Jan Kara <jack@suse.cz>
Cc: linux-fsdevel@vger.kernel.org, Barret Rhoden <brho@google.com>,
Subject: Re: [PATCH] dax: Fix deadlock in dax_lock_mapping_entry()
Date: Thu, 27 Sep 2018 06:28:43 -0700	[thread overview]
Message-ID: <20180927132843.GA19006@bombadil.infradead.org> (raw)
In-Reply-To: <20180927112332.3649-1-jack@suse.cz>

On Thu, Sep 27, 2018 at 01:23:32PM +0200, Jan Kara wrote:
> When dax_lock_mapping_entry() has to sleep to obtain entry lock, it will
> fail to unlock mapping->i_pages spinlock and thus immediately deadlock
> against itself when retrying to grab the entry lock again. Fix the
> problem by unlocking mapping->i_pages before retrying.

It seems weird that xfstests doesn't provoke this ...
Linux-nvdimm mailing list

  reply	other threads:[~2018-09-27 13:28 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-27 11:23 Jan Kara
2018-09-27 13:28 ` Matthew Wilcox [this message]
2018-09-27 13:41   ` Jan Kara
2018-09-27 18:22     ` Dan Williams
2018-10-04 16:27       ` Jan Kara
2018-10-05  1:57         ` Dan Williams
2018-10-05  2:52           ` Matthew Wilcox
2018-10-05  4:01             ` Dan Williams
2018-10-05  4:28               ` Dan Williams
2018-10-05  9:54                 ` Jan Kara
2018-10-06 18:04                   ` Dan Williams

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