On Fri, Jul 26, 2013 at 06:31:34PM +0800, Chinmay V S wrote: > 1. Do not worry about coherency between the page-cache and the data > transferred using O_DIRECT. The kernel will invalidate the cache after > an O_DIRECT write and flush the cache before an O_DIRECT read. Thank you. Grey skies are clearing up now. !!amit