Another problem with the lock granularity is the use of
cli() instead of a private spinlock in many drivers,
although most of them are not performance critical.
[e.g. the complete ISDN subsystem].
Please note that fine grained locks are sometimes slower
that one big lock under realistic loads, e.g. I removed
the per-semaphore array spinlocks from the SysV code
because it was 5% slower than the simple lock.
-- Manfred----------------------------------------------------- This mail sent through IMP: http://web.horde.org/imp/
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/