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proc.5: Document removal of timer_stats file 

timer_stats was removed in Linux commit commit v4.11-rc1~177^2~5
citing security concerns.

* man5/proc.5 (.SS Files and directories)
  <.TP .I /proc/timer_stats>: Mention the last Linux version where
  the file was available along with the reasons of removal.

Signed-off-by: Eugene Syromyatnikov <evgsyr@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Eugene Syromyatnikov 2017-09-11 05:04:07 +02:00 committed by Michael Kerrisk
parent 3f1144fc01
commit d3546d80e8
1 changed files with 7 additions and 1 deletions
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8
man5/proc.5
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@ -5338,10 +5338,12 @@ This read-only file exposes a list of all currently pending
(high-resolution) timers,
all clock-event sources, and their parameters in a human-readable form.
.TP
.IR /proc/timer_stats " (since Linux 2.6.21)"
.IR /proc/timer_stats " (since Linux 2.6.21, before Linux 4.11)"
.\" commit 82f67cd9fca8c8762c15ba7ed0d5747588c1e221
.\" Date: Fri Feb 16 01:28:13 2007 -0800
.\" Text largely derived from Documentation/timers/timer_stats.txt
.\" removed in commit dfb4357da6ddbdf57d583ba64361c9d792b0e0b1
.\" Date: Wed Feb 8 11:26:59 2017 -0800
This is a debugging facility to make timer (ab)use in a Linux
system visible to kernel and user-space developers.
It can be used by kernel and user-space developers to verify that
@ -5435,6 +5437,10 @@ the function where the timer was initialized; and
(in parentheses)
the callback function that is associated with the timer.
.RE
.IP
During the Linux 4.11 development cycle this functionality has been removed,
as it exposes information across namespaces, and there is possibility to obtain
the same information via in-kernel tracing facilities such as ftrace.
.TP
.I /proc/tty
Subdirectory containing the pseudo-files and subdirectories for