On Thu, Apr 19, 2018 at 10:38:25AM -0400, Jerome Glisse wrote: > Oh can i get one more small slot for fs ? I want to ask if they are > any people against having a callback everytime a struct file is added > to a task_struct and also having a secondary array so that special > file like device file can store something opaque per task_struct per > struct file. Do you really want something per _thread_, and not per _mm_?