Re: /proc and /kern

Alain Williams (
Thu, 3 Dec 1998 21:39:10 +0000

On Thu, Dec 03, 1998 at 10:55:30AM +0000, Tigran Aivazian wrote:
> There are probably many advantages to this, but the more obvious ones are:
> a) It is easier (for user program) to process /proc under assumption that
> we won't find anything "modern", i.e. anything other a plain old <pid>
> directory.
> b) This is the way it is done under UnixWare, i.e. /proc and
> /system/processor (/processorfs) are separate filesystems and /proc only
> contains <pid> directories.
> c) Different permission semantics can be implemented, e.g. one could allow
> creation of FIFOs in /kern but not in /proc to cater for cases like the
> recently-discussed /proc/pci compatibility issue.
> ......
> > I realize that this could cause a major flag day since lots of stuff
> > depends on /proc, so I propose to make it configurable (either compile
> > time configurable or maybe mount time if possible), so that initially
> > people would only turn it on when they were trying to find out what
> > would break.

It need not break applications: all that we need to do is to make the
non-process files in /proc symblinks to ../system/XXXX, and to do that
for a major rev or 2 of the kernel (time to let the 'legacy' stuff be
made obsolete by some other set of kernel changes).

Something for 2.3

Alain Williams

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