* Matthew Dillon <email@example.com> [070820 11:43] wrote:
> We have a lwp_kill() system call that sends a signal to a thread within
> a process. It turns out to be fairly necessary for any sort of heavily
> integrated multi-threaded work. In our case we need it to be able to
> issue IPIs (aka SIGUSR1) to cpus within a SMP virtual kernel.
> int lwp_kill(pid_t pid, lwpid_t tid, int sig);
It's always bothered me that there wasn't a generation count
included in the kill(2) interface.
What do you think about that?
It would be useful for pidfiles to ensure that a recycled pid
doesn't get a program SIGwhatever'd.
- Alfred Perlstein