Re: [PATCH] per-backing dev unplugging #2

[Jeremy Higdon]

On Tue, Mar 16, 2004 at 05:36:18PM +1100, Nick Piggin wrote:
> 
> 
> Jeremy Higdon wrote:
> 
> >My tests were on an 8 CPU x 1300 MHz Altix with 64 disks.
> >
> >
> 
> Nice - so if you had enough IO capacity to saturate the CPUs it
> might come close to a 4x improvement - and this sounds like one
> of your baby systems?

Baby by cpu count, mid size by I/O capability.  Extrapolations of
this sort are fraught with peril.  However, it is conceivable that
we would end up with 4X the IOPS.

> I wonder why nobody's complained about this before?

Well, some of us have, but probably not very loudly.  I had
naively believed that the global unplug was gone in 2.6.

jeremy
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