On Thu, 17 Aug 2006, Alexander Leidinger wrote:
- protect td->td_proc->p_pid with the proc lock in linux_getpid in the amd64 (= non i386) case [1]
Is this necessary? In principle, td->td_proc is static for a live thread bound to a process (i.e., in a system call, which the current thread presumable is, as long as td == curthread), p_pid is static for a live process that isn't exiting (so in a system call is not generally exiting). The native FreeBSD getpid() only acquires the process lock when following p_pptr, since this can change during a system call (i.e., as a result of the parent dying, and the child being re-parented to init(8)).
Robert N M Watson Computer Laboratory University of Cambridge _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/cvs-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"
