On Mon, Aug 19, 2013 at 01:10:26PM +0200, Peter Zijlstra wrote: > So no, if we need per-cpu iowait time we have to do A. > > Since we already have atomics in the io_schedule*() paths, please > replace those with (seq)locks. Also see if you can place the entire > iowait accounting thing in a separate cacheline.
Also, it completely blows to have these extra atomics in the IO paths, I'm sure that the Mega-IOP/s people would be much pleased if we could remove these. -- 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/
