On Tue, Sep 27, 2016 at 06:08:24PM +0200, Jan Kara wrote:
> Currently we never clear dirty tags in DAX mappings and thus address
> ranges to flush accumulate. Now that we have locking of radix tree
> entries, we have all the locking necessary to reliably clear the radix
> tree dirty tag when flushing caches for corresponding address range.
> Similarly to page_mkclean() we also have to write-protect pages to get a
> page fault when the page is next written to so that we can mark the
> entry dirty again.
> Signed-off-by: Jan Kara <j...@suse.cz>

Looks great. 

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