(split) LDP: Update original to LDP v3.40.

[linuxjm/LDP_man-pages.git] / original / man2 / prctl.2

diff --git a/original/man2/prctl.2 b/original/man2/prctl.2
index 6f63908..5e0d8fc 100644 (file)
--- a/original/man2/prctl.2
+++ b/original/man2/prctl.2
@@ -37,13 +37,15 @@
 .\" 2008-06-13 Erik Bosman, <ejbosman@cs.vu.nl>
 .\"     Document PR_GET_TSC and PR_SET_TSC.
 .\" 2008-06-15 mtk, Document PR_SET_SECCOMP, PR_GET_SECCOMP
-.\" 2009-10-03 Andi Kleen, document PR_MCE_KILL_*
+.\" 2009-10-03 Andi Kleen, document PR_MCE_KILL
+.\" 2012-04 Cyrill Gorcunov, Document PR_SET_MM
+.\" 2012-04-25 Michael Kerrisk, Document PR_TASK_PERF_EVENTS_DISABLE and
+.\"                            PR_TASK_PERF_EVENTS_ENABLE
 .\"
 .\" FIXME: Document PR_SET_TIMERSLACK and PR_GET_TIMERSLACK (new in 2.6.28)
-.\" FIXME: Document PR_TASK_PERF_EVENTS_DISABLE and
-.\"        PR_TASK_PERF_EVENTS_ENABLE (new in 2.6.32)
+.\"            commit 6976675d94042fbd446231d1bd8b7de71a980ada
 .\"
-.TH PRCTL 2 2012-04-14 "Linux" "Linux Programmer's Manual"
+.TH PRCTL 2 2012-04-23 "Linux" "Linux Programmer's Manual"
 .SH NAME
 prctl \- operations on a process
 .SH SYNOPSIS
@@ -220,7 +222,9 @@ in the range 1..maxsig, or 0 to clear).
 This is the signal that the calling process will get when its
 parent dies.
 This value is cleared for the child of a
-.BR fork (2).
+.BR fork (2)
+and (since Linux 2.5.36 / 2.6.23)
+when execing a set-user_ID or set-group-ID binary.
 .TP
 .BR PR_GET_PDEATHSIG " (since Linux 2.3.15)"
 Return the current value of the parent process death signal,
@@ -297,6 +301,33 @@ is not currently implemented
 Return (as the function result) which process timing method is currently
 in use.
 .TP
+.BR PR_TASK_PERF_EVENTS_DISABLE " (since Linux 2.6.31)"
+Disable all performance counters attached to the calling process,
+regardless of whether the counters were created by
+this process or another process.
+Performance counters created by the calling process for other
+processes are unaffected.
+For more information on performance counters, see the kernel source file
+.IR tools/perf/design.txt .
+.IP
+Originally called
+.BR PR_TASK_PERF_COUNTERS_DISABLE ;
+.\" commit 1d1c7ddbfab358445a542715551301b7fc363e28
+renamed (with same numerical value)
+in Linux 2.6.32.
+.TP
+.BR PR_TASK_PERF_EVENTS_ENABLE " (since Linux 2.6.31)"
+The converse of
+.BR PR_TASK_PERF_EVENTS_DISABLE ;
+enable performance counters attached to the calling process.
+.IP
+Originally called
+.BR PR_TASK_PERF_COUNTERS_ENABLE ;
+.\" commit 1d1c7ddbfab358445a542715551301b7fc363e28
+renamed
+.\" commit cdd6c482c9ff9c55475ee7392ec8f672eddb7be6
+in Linux 2.6.32.
+.TP
 .BR PR_SET_TSC " (since Linux 2.6.26, x86 only)"
 Set the state of the flag determining whether the timestamp counter
 can be read by the process.