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Ingo Molnar <mingo@elte.hu> wrote: > > * Con Kolivas <kernel@kolivas.org> wrote: > > > At least it appears Intel are well aware of the priority problem, but > > full priority support across logical cores is not likely. However I > > guess these new instructions are probably enough to work with if > > someone can do the coding. > > these instructions can be used in the idle=poll code instead of rep-nop. > This way idle-wakeup can be done via the memory bus in essence, and the > idle threads wont waste CPU time. (right now idle=poll wastes lots of > cycles on HT boxes and is thus unusable.) The code to do this was merged quite a while ago. See arch/i386/kernel/process.c:mwait_idle(). I was hoping to see a spinlock patch using mwait(), but nothing yet.. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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