[dm-devel] Re: Do not overload dispatch queue (Was: Re: IO scheduler based IO controller V10)

[Mike Galbraith]

On Sat, 2009-10-03 at 16:28 +0200, Jens Axboe wrote:
> On Sat, Oct 03 2009, Mike Galbraith wrote:
> > On Sat, 2009-10-03 at 09:56 -0400, Vivek Goyal wrote:
> > 
> > > I have kept the overload delay period as "cfq_slice_sync" same as Mike had
> > > done. We shall have to experiment what is a good waiting perioed. Is 100ms
> > > too long if we are waiting for a request from same process which recently
> > > finished IO and we did not enable idle on it.
> > > 
> > > I guess we can tweak the delay period as we move along.
> > 
> > I kept the delay period very short to minimize possible damage. Without
> > the idle thing, it wasn't enough, but with, worked a treat, as does your
> > patch.
> 
> Can you test the current line up of patches in for-linus? It has the
> ramp up I talked about included as well.

Sure.  I'll go find it.

	-Mike