On Thu, 24 Jun 1999, Alfred Perlstein wrote: > On Thu, 24 Jun 1999, Karl Denninger wrote: > > A simple start would be to explicitly put a macro or call in each > syscall to push down the lock. That way people can move that > macro farther and farther down in the syscall code path, hopefully > removing it entirely in some cases. I think having the call at > the beginning of each syscall would motivate people into doing that > sort of work. > > "Hey, y'know getppid() is safe, i'll just take the lock out." > "this function xxx() is safe until this point I can process a lot > before actually needing this lock..." > "y'know I just have a structure that's not accessable to any other calls > that i'm going to fill in, i'll just lift the lock right here" > "if I just do this something here, I really am re-entrant and safe.." > > Providing a simple api for spinlocks and mutexes would be very nice. >
Something along the lines of how spl()s work? And mutex allocation like what we do with malloc types, maybe? > If some of the FreeBSD gods (core) said something along the lines > of we'd like to see the process table have XXX method of access > and locking people will code it, the same way with the many other > subsystems. > > Things like pmap and UFS and INET will be a royal pain to get > SMP safe, however baby steps towards lifting the lock for > simpler subsystems will lead the way. FreeBSD has the > most intellegent people in the industry working together, > all that is needed is a starting point. > > -Alfred Perlstein - [[email protected]|[email protected]] > systems administrator and programmer > Win Telecom - http://www.wintelcom.net/ > > > > To Unsubscribe: send mail to [email protected] > with "unsubscribe freebsd-hackers" in the body of the message > Brian Fundakowski Feldman _ __ ___ ____ ___ ___ ___ [email protected] _ __ ___ | _ ) __| \ FreeBSD: The Power to Serve! _ __ | _ \._ \ |) | http://www.FreeBSD.org/ _ |___/___/___/ To Unsubscribe: send mail to [email protected] with "unsubscribe freebsd-hackers" in the body of the message
