On 2011-12-19 19:27, Vivek Goyal wrote: > I think reverting the previous series is not going to be simple either. It > had 13 patches. > > https://lkml.org/lkml/2011/5/19/560 > > By making stats per cpu, I was able to reduce contention on request > queue lock. Now we shall have to bring the lock back. That's not going to happen, having that lock in there was a disaster for small IO on fast devices. It's essentially the limiting factor on benchmark runs on the RHEL kernels that have it included and enabled... -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
