On Wed, Oct 28, 2015 at 5:36 PM, Ricardo Nunes <ricardomiguel...@gmail.com> wrote: > Hi, > > I'm making a UML driver to adapt a real driver to UML and hardware > emulation. > > In this case I have a kernel thread trying to read a register, which is now > done through a netlink channel to a userspace application (asynchronous > response) but inside a synchronous function (the function that I'm > implementing returns the register value). The first attempt was done doing: > > Kernel thread > > sleeping_task = current; > set_current_state(TASK_INTERRUPTIBLE); > schedule(); > > Netlink new message callback > > wake_up_process(sleeping_task); > > But the kernel thread never runs again, unless I call schedule() in netlink > callback function after wake_up_process, which will make that callback being > blocked. I also tried using wait_queue but after the same result I saw the > functions and realised that they also use schedule for putting the process > to sleep. > > This worked in a "real" linux module (not with netlink callback, but between > 2 kernel threads), I don't understand why shouldn't in UML. Any reason you > might remember?
Can you please share your code? -- Thanks, //richard ------------------------------------------------------------------------------ _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
