20 Sep
2006
20 Sep
'06
9:05 a.m.
Anthony Williams wrote: [...]
He claims that the second A: lock takes the slow path, when it could have taken the fast path because the lock is free. I disagree. The lock is NOT free, since B is waiting on it. If A can take the fast path here, that's opening the door for B to be starved.
That's not a problem as long what we need is efficient low level exclusive lock. If starvation is a problem, one can solve it with custom scheduling monitor on top of "grab if you can" low level exclusive lock without handoff. Low level, all pigs are equal. ;-) regards, alexander.