On Tue, Sep 23, 2014 at 04:57:10PM -0400, Tejun Heo wrote: > Hmmm... how does it affect single device operation tho? It does make > individual interrupt handling heavier, no? I think it is difficult to assess "individual interrupt handling", since it depends from both the hardware and device access pattern. On the system I use the results are rather counter-intuitive: ahci_thread_fn() does not show up in perf report at all, nor ahci_single_irq_intr(). While before the change ahci_single_irq_intr() reported 0.00%. But since the handling is split in two parts it is rather incorrect to apply the same metric to the threaded context. Obviously, the threaded handler is expected slowed down by other interrupts handlers, but the whole system should benefit from it, which is exactly the aim of this change. > -- > tejun -- Regards, Alexander Gordeev agordeev@xxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
