From: Ross Zwisler <ross.zwisler@linux.intel.com>
Subject: Re: [PATCH 15/18] dax: Allow DAX code to replace exceptional entries
Date: Fri, 29 Apr 2016 14:29:26 -0600
Message-ID: <20160429202926.GI5888@linux.intel.com>
References: <1461015341-20153-1-git-send-email-jack@suse.cz>
 <1461015341-20153-16-git-send-email-jack@suse.cz>
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Cc: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
	linux-mm@kvack.org, Ross Zwisler <ross.zwisler@linux.intel.com>,
	Dan Williams <dan.j.williams@intel.com>, linux-nvdimm@lists.01.org,
	Matthew Wilcox <willy@linux.intel.com>
To: Jan Kara <jack@suse.cz>
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On Mon, Apr 18, 2016 at 11:35:38PM +0200, Jan Kara wrote:
> Currently we forbid page_cache_tree_insert() to replace exceptional radix
> tree entries for DAX inodes. However to make DAX faults race free we will
> lock radix tree entries and when hole is created, we need to replace
> such locked radix tree entry with a hole page. So modify
> page_cache_tree_insert() to allow that.
> 
> Signed-off-by: Jan Kara <jack@suse.cz>

Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>

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