On Wed, 18 Nov 2009 17:28:53 +0100, Leon Woestenberg wrote: > On Wed, Nov 18, 2009 at 2:05 AM, Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> wrote: > > Our timers are very efficient and some day we will need to make jiffies a > > function and stop the timer ticking for best performance. At that point > > timers are probably the most efficient way to do much of this. > > The problem with I2C bitbanged is the stringent timing, we need a way > to have fine-grained sleeping > mixed with real-time tasks in order to make this work. FWIW, the problem that was initially reported has nothing to do with this. i2c-algo-bit used mdelay() during transactions, not yield(). yield() is used only in once place, _between_ transactions attempts. There are no strict timing constraints there. -- Jean Delvare -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
