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 And in the light of clear_bdi_congestion() being called for each writeout completion under the threshold this does make sense. So this whole 8-12/12 series is not needed and just served as an learning experience :-/ - 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/
