25 Sep
2017
25 Sep
'17
3:38 a.m.
On Sep 24, 2017, at 1:36 PM, Kurt H Maier
<khm(a)sciops.net> wrote:
On Sun, Sep 24, 2017 at 07:06:17AM -0700, Larry McVoy wrote:
$ svn log sys/fs/procfs/procfs.c | head
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r314690 | badger | 2017-03-04 19:05:24 -0800 (Sat, 04 Mar 2017) | 15 lines
remove procfs ctl interface
This interface has no in-tree consumers and has been more or less
non-functional for several releases.
Remove manpage note that the procfs special file 'mem' is grouped to
kmem. This hasn't been true since r81107.
Remove procfs' README file. It is an out of date duplication of the manpage
(quoth the README: "since the bsd kernel is single-processor...").
Reviewed by: vangyzen, bcr (manpage)
Approved by: des (procfs maintainer), vangyzen (mentor)
Differential Revision: https://reviews.freebsd.org/D9802
------------------------------------------------------------------------
r232278 | mm | 2012-02-28 16:30:18 -0800 (Tue, 28 Feb 2012) | 5 lines
There are just a few potential users of /proc and they were already
using other facilities. plus /proc is an optional facility. All this
conspired to make /proc less useful in FreeBSD. Unused code is in
danger of being garbage collected in FreeBSD :-)
+1 on what Ron said. I don't get the
rationale for going back to ptrace.
Anyone know what it is? Is there a perf issue?
The usual rationale presented is that someone can exhaust the fd table
and then you can't get anything done. Instead of fixing that problem,
the popular approach is to add more syscalls, like with getrandom(2).