Re: Do not overload dispatch queue (Was: Re: IO scheduler based IOcontroller V10)

[Jens Axboe]

On Sat, Oct 03 2009, Mike Galbraith wrote:
> 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.
> 
> Well, it hasn't hit git.kernel.org yet, it's at...
> 
> * block-for-linus        1d22351 cfq-iosched: add a knob for desktop interactiveness

It's the top three patches here, kernel.org sync sometimes takes a
while...

http://git.kernel.dk/?p=linux-2.6-block.git;a=shortlog;h=refs/heads/for-linus

-- 
Jens Axboe

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