Readahead concurrently with udev coldplug?

Henrique de Moraes Holschuh hmh at
Mon Aug 25 21:14:30 UTC 2008

On Fri, 22 Aug 2008, Petter Reinholdtsen wrote:
> [Henrique de Moraes Holschuh]
> > I have noticed in my lenny laptop that readahead runs BEFORE udev coldplug,
> > stalling for a few seconds on disk reads.
> >
> > Could we do both concurrently, or break it in two (udev readahead; udev
> > coldplug + normal readahead)?
> Why would it make sense to not do readahead before coldplug?  I guess

Becase every bit of paralelism that doesn't slow down one of the components
help :)

> we will need to measure the effect on boot speed for different
> approaches.

Yes, that's the better approach.

  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh

More information about the initscripts-ng-devel mailing list