On Fri, Feb 08, 2019 at 03:21:51PM -0800, Andrew Morton wrote: > It sounds like it. A 10khz interrupt will overflow in 4 days... If you've got a 10kHz interrupt, you have a bigger problem. Anything happening 10,000 times a second is going to need interrupt mitigation to perform acceptably. More importantly, userspace can (and must) cope with wrapping. This isn't anything new from Thomas' patch. As long as userspace is polling more often than once a day, it's going to see a wrapped value before it wraps again, so it won't miss 4 billion interrupts.
