Re: [GIT PATCH] Remove devfs from 2.6.12-git

From: Greg KH
Date: Thu Jun 23 2005 - 04:18:24 EST

On Wed, Jun 22, 2005 at 11:37:59PM -0700, Andrew Morton wrote:
> Mike Bell <kernel@xxxxxxxxxxxx> wrote:
> >
> > On Thu, Jun 23, 2005 at 03:14:08PM +0900, Miles Bader wrote:
> > > BTW, has anyone done a comparison of the space usage of udev vs. devfs
> > > (including size of code etc....)?
> >
> > Greg gave me an "I assume so" estimate that udev was smaller by excluding
> > the size of sysfs a while back. If you include sysfs in udev's overhead
> > then I believe devfs wins handily, but I haven't done the numbers to
> > prove it so my estimate is no better. I'm just basing it on sysfs being
> > absolutely huge, in linux-tiny terms.
> sysfs certainly has a history of goggling gobs of memory. But you can
> disable it in .config.

Now the majority of sysfs memory is cachable and can get reclaimed quite
easily. The people running the 20,000 disk farms on a 31 bit
architecture made sure of that.


greg k-h
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