linux-kernel - /proc 2.6.24 changes for guest CPU accounting

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <485DFFB4.3080008@gmail.com>
Date:	Sun, 22 Jun 2008 09:31:00 +0200
From:	Michael Kerrisk <mtk.manpages@...il.com>
To:	Laurent Vivier <Laurent.Vivier@...l.net>
CC:	Samuel Thibault <samuel.thibault@...-lyon.org>, ap@....com.au,
	lkml <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: /proc 2.6.24 changes for guest CPU accounting

Hi Laurent,

A note and patch from Samuel alerted me to your commits
9ac52315d4cf5f561f36dabaf0720c00d3553162 and
5e84cfde51cf303d368fcb48f22059f37b3872de, which in 2.6.24 changed /proc/stat
and /proc/PID/stat.  Would you please CC me on kernel-userspace interface
changes, so that they have a chance of getting documented in man-pages.

(I see that Andrew P tried to get something added to
Documentation/filesystems/proc.txt, but that doesn't seem to have made it in.)

Below is a patch against the proc.5 man page by Samuel and I to document these
changes.  Do the changes look okay to you?  The first part is the change for
/proc/<pid>/stat, and the other is for /proc/stat.

Cheers,

Michael



===================================================================
--- proc.5      (revision 4046)
+++ proc.5      (working copy)
@@ -753,6 +753,13 @@
  .TP
  \fIdelayacct_blkio_ticks\fP %llu (since Linux 2.6.18)
  Aggregated block I/O delays, measured in clock ticks (centiseconds).
+.TP
+\fIguest_time\fP %lu (since Linux 2.6.24)
+Guest time of the process (time spent running a virtual CPU
+for a guest operating system), in centiseconds.
+.TP
+\fIcguest_time\fP %ld (since Linux 2.6.24)
+Guest time of the process's children, in centiseconds.
  .RE
  .TP
  .I /proc/[number]/statm
@@ -1510,6 +1517,12 @@
  .I steal
  \- stolen time, which is the time spent in other operating systems when
  running in a virtualized environment
+
+Since Linux 2.6.24, there is a ninth column,
+.IR guest ,
+which is the time spent running a virtual CPU for guest
+operating systems under teh control of the Linux kernel.
+.\" See Changelog entry for 5e84cfde51cf303d368fcb48f22059f37b3872de
  .TP
  \fIpage 5741 1808\fP
  The number of pages the system paged in and the number that were paged



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/