[ENBD] Doubled requests

[Peter T. Breuer]

"Also sprach Arne Wiebalck:"
> On Wed, 14 Jan 2004, Peter T. Breuer wrote:
> 
> > > > > BUT: it seems that you already "impemented" a switch for the doubled
> > > > > requests, it's called "merge_requests"! in one of the last tests I forgot
> > > > > to activate  it and now it transferred several 100,000 writes with no
> > > > > twins. I'll investigate further ....
> >
> > I am running with m_r off.
> 
> I have run over night tests with m_r off: one test has 102400 1K requests.
> The test has been done more than 1000 times, and I observed no doubled
> requests. The merge_requuests module parameter really switches it off in
> my setup.

Yes, I may have been mistaken about switching it off. It seems to
reduce (not stop) the effect here too, but there are many things I do
not understand when I look in detail. I am still looking.

Peter