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Date: Sat, 16 Jun 2018 05:07:21 -0700
From: Matthew Wilcox <willy@infradead.org>
Subject: Re: [PATCH v13 00/72] Convert page cache to XArray
Message-ID: <20180616120721.GA15447@bombadil.infradead.org>
References: <20180611140639.17215-1-willy@infradead.org>
 <20180612104041.GB24375@twin.jikos.cz>
 <20180612113122.GA19433@bombadil.infradead.org>
 <20180612193741.GC28436@linux.intel.com>
 <20180612194619.GH19433@bombadil.infradead.org>
 <20180613201021.GA4801@linux.intel.com>
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To: Ross Zwisler <ross.zwisler@linux.intel.com>, dsterba@suse.cz, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Matthew Wilcox <mawilcox@microsoft.com>, Jan Kara <jack@suse.cz>, Jeff Layton <jlayton@redhat.com>, Lukas Czerner <lczerner@redhat.com>, Christoph Hellwig <hch@lst.de>, Goldwyn Rodrigues <rgoldwyn@suse.com>, Nicholas Piggin <npiggin@gmail.com>, Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>, linux-nilfs@vger.kernel.org, Jaegeuk Kim <jaegeuk@kernel.org>, Chao Yu <yuchao0@huawei.com>, linux-f2fs-devel@lists.sourceforge.net

On Wed, Jun 13, 2018 at 02:10:21PM -0600, Ross Zwisler wrote:
> I tested xarray-20180612 vs next-20180612, and your patches cause a new
> deadlock with XFS + DAX + generic/269.  Here's the output from
> "echo w > /proc/sysrq-trigger":

After getting my pmem setup working (thanks for the help Dan &
Jeff), I tracked this down to a missing call to dax_wake_entry() in
dax_writeback_one().  I'm running xfstests -g auto now to see if
there's anything else that needs to be fixed.