On Thu, Dec 14, 2017 at 12:27:32PM +0100, Peter Zijlstra wrote: > From: Thomas Gleixner <t...@linutronix.de> > > Kernel threads can use the mm of a user process temporarily via use_mm(), > but there is no point in installing the LDT which is associated to that mm > for the kernel thread.
So thinking about this a bit more; I fear its not correct. Suppose a kthread does use_mm() and we then schedule to a task of that process, we'll not pass through switch_mm() and we'll not install the LDT and bad things happen. Or am I missing something?
