----- Ursprüngliche Mail ----- > Von: "Johannes Berg" <johan...@sipsolutions.net> >> - mmap_read_lock(mm); >> + /* We use a RCU lock instead of a mm lock, because >> + * this can be invoked out of critical/atomic sections >> + * and that does not agree with the sleepable semantics >> + * of the standard semaphore based mm lock. >> + */ >> + rcu_read_lock(); > > Yeah I guess ... Seems like a very mechanical description of what's > going on, rather than a description of why this is correct (which > assumes no preempt and no SMP)?
Is the VMA list actually RCU aware? On UML we might get away with that, but I agree with Johannes, this needs a more detailed explanation. Thanks, //richard _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um
