On 02/18, Peter Zijlstra wrote: > > On Wed, Feb 18, 2015 at 04:53:34PM +0100, Oleg Nesterov wrote: > > On 02/17, Paul E. McKenney wrote: > > > > > > | mb | wmb | rmb | rbd | acq | rel | ctl | > > > -----+-------+-------+-------+-------+-------+-------+-------+ > > > mb | Y | | Y | y | Y | | Y + > > > -----+-------+-------+-------+-------+-------+-------+-------+ > > > wmb | Y | | Y | y | Y | | Y + > > > -----+-------+-------+-------+-------+-------+-------+-------+ > > > rmb | | | | | | | + > > > -----+-------+-------+-------+-------+-------+-------+-------+ > > > rbd | | | | | | | + > > > -----+-------+-------+-------+-------+-------+-------+-------+ > > > acq | | | | | | | + > > > -----+-------+-------+-------+-------+-------+-------+-------+ > > > rel | Y | | Y | y | Y | | Y + > > > -----+-------+-------+-------+-------+-------+-------+-------+ > > > ctl | | | | | | | + > > > -----+-------+-------+-------+-------+-------+-------+-------+ > > > > OK, so "acq" can't pair with "acq", and I am not sure I understand. > > Please consider the table in the context of message passing; that is > what Paul proposed. Your example from sysvsems, while interesting, would > not fit the general scenario of message passing.
Ah, yeeees, sorry. Somehow I completely missed that part of Paul's email. > This too illustrates a problem with that approach, people can't read, so > they'll pick the wrong table to look at. At least we know that I certainly can't ;) Thanks, Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
