* Ingo Molnar <mingo@xxxxxxx> wrote: > I was thinking about that on and off so loudly that Peter > implemented it long ago via fasync support on the perf event fd! > :-) > > So if you set a notification signal via fcntl(F_SETOWN) on the > scheduler context switch event fd, the user-space RCU code will get > a signal on every context switch. > > I have not tried it for this purpose yet, so let us know if there > are unexpected complications :) Note that you do not want the context switch event, but the CPU migration event: that will notify user-space when it gets migrated to another CPU. This is the case that RCU really needs. Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
