[PATCH] Speed up modprobe and MAKEDEV
Kyle McMartin
kyle at mcmartin.ca
Wed Oct 1 17:28:57 UTC 2008
On Wed, Oct 01, 2008 at 01:26:24PM -0400, Bill Nottingham wrote:
> Kyle McMartin (kyle at mcmartin.ca) said:
> > > MAKEDEV sources almost 500KB of config files on every invocation, and the
> > > inner loop is terribly inefficient. The second patch allows it to shrink
> > > the files to 55KB while expressing the same info and makes the inner loop
> > > more efficient. Depending on how many modprobe and MAKEDEV invocations
> > > are done on your box during bootup, this can or might not make meassurable
> > > difference.
> >
> > Definitely. The biggest win by far for MAKEDEV is profiling the often
> > hit devices, and prioritizing things. Dave Airlie moved a bunch of the
> > cciss and other almost never-seen devices to be sourced last and ended
> > up with a huge win.
>
> Well, the biggest win for MAKEDEV would be to not run it at all on boot -
> we shouldn't have to.
>
Agreed. ;-)
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