On Thu, 2 Feb 2023, Marcelo Tosatti wrote: > > I thought you would only run this while the kernel is not active on the > > remote cpu? Then you dont need any cmpxchg and you can leave the function > > as is. > > The remote cpu can enter kernel mode while this function executes. Isnt there some lock/serializtion to stall the kernel until you are done? > There is no mode which indicates userspace cannot enter the kernel. There are lot of thinngs that happen upon entry to the kernel. I would hope that you can do something there. Scheduler?
