Messages in this thread | | | From | Al Boldi <> | Subject | Re: [PATCH] Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev | Date | Sat, 8 Aug 2009 12:14:39 +0300 |
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Greg KH wrote: > On Sat, Aug 08, 2009 at 12:17:31AM +0300, Al Boldi wrote: > > For devtmpfs to be a realistic replacement for static /dev, it has to > > be comparable to static /dev in both speed and size. > > Since when is this requirement necessary? You want something for free > in both speed and size? Well, you got it in speed, but not size, it > will take up memory that is swapable, and a tiny ammount of non-swapable > kernel memory for the code.
Not so tiny when you count in the hotplug dependency.
> > WRT speed, there should be no slowdown and it should be just as fast > > as a "tar -xp < dev.tar". > > Again, where is this requirement coming from? > > Have you timed devtmpfs?
Not yet, I am still waiting for the latest patch against .30.
> > WRT size, it should not be dependent on hotplug, and instead offer > > hotplug as an option. > > Um, again, who made up such a requirement? Are you running systems > today with CONFIG_HOTPLUG disabled? If so, how well is that working for > you?
It's working out quite well. I don't like hotplug, it's too slow. I always turn it and module-autoloading off, to achieve a much more responsive system.
Thanks!
-- Al
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