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SubjectRe: DEVFSv50 and /dev/fb? (or /dev/fb/? ???)
H. Peter Anvin writes:
> 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:
> > >=20
> > > >In saying waiting, I wasn't meaning the human style foot tapping, co=
> ffee
> > > >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?
> > >=20
> > > You really don' t understand that the inode lookup time is not an iss=
> ue.
> > > Please really stop using it as and argument in favor of devfs.
> >=20
> > How long does it take to lookup a million inodes? This is not
> > significant?
> >=20
>
> 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!)

Answer: way too much! That's why a scsidev or devfs system is
essential.

Regards,

Richard....
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