On 04/20/2016 04:58 PM, Christoph Hellwig wrote:
FYI, none of the Dax code even needs to ever touch the dio_count, as dax I/O can't be asynchronous, and we thus don't need it to protect against truncate. I'd suggest to remove it and then end_io callback from the DAX code entirely as a start and then move from there.
Yes, it seems like we may not need to change the dio_count in dax_do_io() after all. BTW, what do mean by using end_io callback as a start?
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