On 06/14/2017 02:25 PM, Christoph Hellwig wrote: > On Wed, Jun 14, 2017 at 01:05:26PM -0600, Jens Axboe wrote: >> No functional changes in this patch, just in preparation for >> allowing applications to pass in hints about data life times >> for writes. >> >> Pack the i_stream field into a 2-byte hole, so we don't grow >> the size of the inode. > > Can't we find space for 4 flags somewhere else? Where? I can stuff them in i_flags? But apart from that, stealing space in a hole seems the sanest. -- Jens Axboe