Missing information in proc(5)

[roncsak]

proc(5) only lists 44 fields in /proc/pid/stat, however there is more.

Here is what I get (52 fields counted):
3985 (eclipse) S 1 1513 1513 0 -1 4202496 82963 451290 481 284 26636 4125 1938 1267 20 0 22 0 974680 911331328 57317 4294967295 134512640 134526532 3215374240 3215370384 3078403108 0 4 4096 16796879 4294967295 0 0 17 1 0 0 1674 0 0 134532820 134533928 145444864 3215378654 3215378679 3215378679 3215380451 0

What are the additional 8 fields?

/proc/[pid]/stat says the information is defined in /usr/src/linux/fs/proc/array.c It is not there I have linux-headers-3.5.0-17 and linux-headers-3.5.0-17-generic and none of them has array.c in their fs/proc/ dir.

*UPDATE*
There is missing information in /proc/[pid]/status, as well. VmLck is followed by VmPin, which is not in the documentation and VmPTE is followed by VmSwap which is not documented, also.

Description: Ubuntu 12.10
Release: 12.10
Freshly updated from the latest LTS (12.04.1)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Pavel (altusensix)]

Hi guys!
Any update on this ticket?

[Michael Kerrisk (mtk-manpages)]

Upstream maintainer here.

Regarding the /proc/PID/stat, you need to upgrade your man-pages. An update to man-pages in May 2014 added documentation for these fields.

Likewise VmSwap in /proc/PID/status is already documented in recent man-pages.

(See http://man7.org/linux/man-pages/man5/proc.5.html )

For VmPin, the documentation indeed was lacking, and I have added:

              * VmPin: Pinned memory size (since Linux 3.2). These
                are pages that can't be moved because something needs
                to directly access physical memory.

Thanks,

Michael

[Stéphane Aulery (saulery)]

Fixed in manpages 3.82

See commit 157890398be84d22e53a222dce721914c3e533a3
Michael Kerrisk <email address hidden> 2015-03-02 16:22:26 (GMT)

https://git.kernel.org/cgit/docs/man-pages/man-pages.git/commit/man5/proc.5?id=157890398be84d22e53a222dce721914c3e533a3

[Launchpad Janitor (janitor)]

This bug was fixed in the package manpages - 4.02-0ubuntu1

---------------
manpages (4.02-0ubuntu1) xenial; urgency=medium

  * New upstream version, including those changes:
    - random.4: Fix permissions shown for the devices (lp: #1397652)
    - resolv.conf.5: Document RES_SNGLKUPREOP (lp: #1110781)
    - proc.5: Document /proc/PID/status VmPin field (lp: #1071746)
  * debian/rules:
    - don't ship attr manpage to avoid conflict with that package

 -- Sebastien Bacher <email address hidden> Wed, 04 Nov 2015 16:05:28 +0100