On Thu, Dec 19, 2019 at 09:29:14AM +0800, Ming Lei wrote: > On Wed, Dec 18, 2019 at 10:51:01AM +0100, Peter Zijlstra wrote: > > On Wed, Dec 18, 2019 at 03:19:40PM +0800, Ming Lei wrote: > > > Scheduler runqueue maintains its own software clock that is periodically > > > synchronised with hardware. Export this clock so that it can be used > > > by interrupt flood detection for saving the cost of reading from hardware. > > > > But you don't have much, if any, guarantees the thing gets updated. > > Any software clock won't be guaranteed to be updated in time, however, > they are still useful. It still is broken, and I really don't want to expose this for whatever reason.
