Messages in this thread | | | Date | Fri, 12 Aug 2011 20:59:52 +0800 | From | Wu Fengguang <> | Subject | Re: [PATCH 2/5] writeback: dirty position control |
| |
On Fri, Aug 12, 2011 at 08:54:17PM +0800, Peter Zijlstra wrote: > On Fri, 2011-08-12 at 00:56 +0200, Peter Zijlstra wrote: > > > > s - x 3 > > f(x) := 1 + (-----) > > d > > > btw, if you want steeper slopes for rampup and brake you can add another > factor like: > > s - x 3 > f(x) := 1 + a(-----) > d > > And solve the whole f(l)=0 thing again to determine d in l and a. > > For 0 < a < 1 the slopes increase.
Yes, we can leave it as a future tuning option. For now I'm pretty satisfied with the current function's shape :)
Thanks, Fengguang
| |