Re: Cache queue_congestion_on/off_threshold

[Nick Piggin]

Jens Axboe wrote:
> On Fri, May 07 2004, Chen, Kenneth W wrote:
>
> > > > > > Jens Axboe wrote on Friday, May 07, 2004 2:39 AM
> > >
> > > On Thu, May 06 2004, Chen, Kenneth W wrote:
> > >
> > > > (3) can we allocate request structure up front in __make_request?
> > > >    For I/O that cannot be merged, the elevator code executes twice
> > > >    in __make_request.
> > >
> > > Actually, with the good working batching we might get away with killing
> > > freereq completely. Have you tested that (if not, could you?)
> >
> > Sorry, I'm clueless on "good working batching".  If you could please give
> > me some pointers, I will definitely test it.
>
>
> Something like this.

While we're doing that can we drop the GFP_ATOMIC allocation
completely?
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