On Thu, 2009-10-08 at 09:58 +0800, Wu Fengguang wrote: > > > How this runqueue->nr_iowait is handled now ? > > Good question. io_schedule() has an old comment for throttling IO wait: > > * But don't do that if it is a deliberate, throttling IO wait (this task > * has set its backing_dev_info: the queue against which it should throttle) > */ > void __sched io_schedule(void) > > So it looks both Jens' and this patch behaves right in ignoring the > iowait accounting for balance_dirty_pages() :) Well it is a change in behaviour, and I think IOWAIT makes sense when we're blocked due to io throttle.. Hmm? -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
