Hello,
I'm sending the patch for proc.5 which adds the information about
/proc/[pid]/cgroup.
Ivana Hutarova Varekova
diff -up man-pages-3.32/man5/proc.5.pom man-pages-3.32/man5/proc.5
--- man-pages-3.32/man5/proc.5.pom 2011-05-27 10:11:52.000000000 +0200
+++ man-pages-3.32/man5/proc.5 2011-05-27 09:17:37.000000000 +0200
@@ -94,12 +94,35 @@ to the process at exec time.
The format is one \fIunsigned long\fP ID
plus one \fIunsigned long\fP value for each entry.
The last entry contains two zeros.
-.\" FIXME Describe /proc/[pid]/cgroup and
-.\" /proc/[pid]/task/[tid]/cgroup
-.\" Info in Documentation/cgroups.txt
-.\" Added in 2.6.24
-.\" CONFIG_CGROUPS
-.\"
+.TP
+.I /proc/[pid]/cgroup " (since Linux 2.6.24)"
+This file describes control groups to which the process/task
+belongs. For each cgroup hierarchy there is one entry of the form
+.nf
+.ft CW
+
+ 5:cpuacct,cpu,cpuset:/daemons
+(1) (2) (3)
+.ft
+.fi
+.IP
+The numbers in parentheses are labels for the descriptions below:
+.RS 7
+.TP 5
+(1)
+hierarchy id number
+.TP
+(2)
+set of subsystems bound to the hierarchy
+.TP
+(3)
+control group in the hierarchy to which the process belongs
+.RE
+.IP
+
+This file is only present if the
+.B CONFIG_CGROUPS
+kernel configuration option is enabled.
.\" FIXME Describe /proc/[pid]/clear_refs
.\" Added in 2.6.22
.\" "Clears page referenced bits shown in smaps output"
