On Sat, Apr 21, 2007 at 09:34:07AM -0700, Linus Torvalds wrote: > > > On Sat, 21 Apr 2007, Willy Tarreau wrote: > > > > If you remember, with 50/50, I noticed some difficulties to fork many > > processes. I think that during a fork(), the parent has a higher probability > > of forking other processes than the child. So at least, we should use > > something like 67/33 or 75/25 for parent/child. > > It would be even better to simply have the rule: > - child gets almost no points at startup > - but when a parent does a "waitpid()" call and blocks, it will spread > out its points to the childred (the "vfork()" blocking is another case > that is really the same). > > This is a very special kind of "priority inversion" logic: you give higher > priority to the things you wait for. Not because of holding any locks, but > simply because a blockign waitpid really is a damn big hint that "ok, the > child now works for the parent".
I like this idea a lot. I don't know if it can be applied to pipes and unix sockets, but it's clearly a way of saying "hurry up, I'm waiting for you" which seems natural with inter-process communications. Also, if we can do this on unix sockets, it would help a lot with X ! Willy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
