search for: lockevent_writ

...2019-04-04 84 * Function to handle write request fb346fd9fc081c Waiman Long 2019-04-04 85 * fb346fd9fc081c Waiman Long 2019-04-04 86 * When idx = reset_cnts, reset all the counts. fb346fd9fc081c Waiman Long 2019-04-04 87 */ fb346fd9fc081c Waiman Long 2019-04-04 88 static ssize_t lockevent_write(struct file *file, const char __user *user_buf, fb346fd9fc081c Waiman Long 2019-04-04 89 size_t count, loff_t *ppos) fb346fd9fc081c Waiman Long 2019-04-04 90 { fb346fd9fc081c Waiman Long 2019-04-04 91 int cpu; fb346fd9fc081c Waiman Long 2019-04-04 92 fb346fd9fc081c Waiman Long...

This series adds an option to use queued spinlocks for powerpc, and makes it the default for the Book3S-64 subarch. This effort starts with the generic code so it's very simple but still very performant. There are optimisations that can be made to slowpaths, but I think it's better to attack those incrementally if/when we find things, and try to add the improvements to generic code as