Re: DEVFSv50 and /dev/fb? (or /dev/fb/? ???)

H. Peter Anvin (hpa@transmeta.com)
6 Aug 1998 08:38:30 GMT

Followup to: <199808060119.LAA01437@vindaloo.atnf.CSIRO.AU>
By author: Richard Gooch <Richard.Gooch@atnf.CSIRO.AU>
In newsgroup: linux.dev.kernel
>
> Andrea Arcangeli writes:
> > On Wed, 5 Aug 1998, Shawn Leas wrote:
> >
> > >In saying waiting, I wasn't meaning the human style foot tapping, coffee
> > >getting, *long wait* that it might have sounded like. I meant that little
> > >bit of time spent is unnecessary. Bigger deal for some than others, no?
> >
> > You really don' t understand that the inode lookup time is not an issue.
> > Please really stop using it as and argument in favor of devfs.
>
> How long does it take to lookup a million inodes? This is not
> significant?
>

Unless your filesystem is crummy for directory lookup (which ext2fs
currently is, but that is the problem that should be fixed), it
shouldn't be significant. Counter question: how much kernel memory
does it take to keep a million devices with all their info (atime,
mtime, ctime, permissions, ownership all included!)

-hpa

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