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

[Jens Axboe <jens axboe oracle com>]

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.

-- 
Jens Axboe