On Fri, 06 Apr 2007 09:01:57 +0200 Peter Zijlstra <[EMAIL PROTECTED]> wrote:
> On Thu, 2007-04-05 at 16:24 -0700, Andrew Morton wrote: > > On Thu, 05 Apr 2007 19:42:21 +0200 > > [EMAIL PROTECTED] wrote: > > > > > Now that we have per BDI dirty throttling is makes sense to also have oer > > > BDI > > > congestion feedback; why wait on another device if the current one is not > > > congested. > > > > Similar comments apply. congestion_wait() should be called > > throttle_at_a_rate_proportional_to_the_speed_of_presently_uncongested_queues(). > > > > If a process is throttled in the page allocator waiting for pages to become > > reclaimable, that process absolutely does not care whether those pages were > > previously dirty against /dev/sda or against /dev/sdb. It wants to be woken > > up for writeout completion against any queue. > > OK, so you disagree with Miklos' 2nd point here: > http://lkml.org/lkml/2007/4/4/137 Yup, silly man thought that "congestion_wait" has something to do with congestion ;) I think it sort-of used to, once. Now it really means no more than "block until a batch of writes complete". - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
