On Mon, 1 Jul 2013, James Hogan wrote: > Use a completion to block until a secondary CPU has started up, like ARM > do, instead of a loop of udelays. > > On Meta, SMP is really SMT, with each "CPU" being a different hardware > thread on the same Meta processor core, so as well as being more > efficient and latency friendly, using a completion prevents the bogomips > of the secondary CPU from being drastically skewed every time by the > execution of the tight in-cache udelay loop on the other CPU.
The least of our worries is the correctness of bogomips. But if that patch makes bogomips less bogus while fixing a real issue, please add my Acked-by: Thomas Gleixner <t...@linutronix.de> -- 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/
