Make sure that literal * characters are not interpreted as emphasis
markers.
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it into Sphinx TOC tree. No essential content change.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

Add ftrace-uses.rst into Sphinx TOC tree. Few format issues are fixed.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This converts the plain text documentation to reStructuredText format and
add it to Sphinx TOC tree. This documentation is not synced with current
code, so mark it as out of date.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This just add a index.rst for trace subsystem. More docs will
be added later.

Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: NChangbin Du <changbin.du@intel.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

There is no file named 'enabled' in the directory tracing/events. It should
be the file 'enable'.
Signed-off-by: NXiongwei Song <sxwjean@me.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

ftrace-uses.rst is not yet included into any toctree, but since it is
a .rst file, it is parsed by the Sphinx build. Thats, why we see some
WARNINGS:

- trace/ftrace-uses.rst:53: WARNING: Definition list ends without a blank line; unexpected unindent.
- trace/ftrace-uses.rst:89: WARNING: Inline emphasis start-string without end-string.
- trace/ftrace-uses.rst:89: WARNING: Inline emphasis start-string without end-strin

Fixing the code-block directives results in a less noisy build, but the 'not
included' WARNING will be stay:

- trace/ftrace-uses.rst: WARNING: document isn't included in any toctree
Signed-off-by: NMarkus Heiser <markus.heiser@darmarit.de>
Acked-by: NSteven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

With the coming removal of jprobes, using ftrace callbacks is one of the
utilities that replace the jprobes functionality. Having a document that
explains how to use ftrace as such will help in the transition from jprobes
to ftrace. This document is for kernel developers that require attaching a
callback to a function within the kernel.

Link: http://lkml.kernel.org/r/150724519527.5014.10207042218696587159.stgit@devboxSigned-off-by: NSteven Rostedt (VMware) <rostedt@goodmis.org>
[jc: fixed one formatting issue that broke the docs build]
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

In the coresight CPU debug document it suggests to use 'echo' command
to set latency request to /dev/cpu_dma_latency so can disable all CPU
idle states, but in fact this doesn't work.

This is because when the command 'echo' exits, it releases the device
node's file descriptor and the kernel release function removes the QoS
constraint; finally when the command 'echo' finished there have no
constraint imposed on cpu_dma_latency.

This patch changes to use 'exec' to access '/dev/cpu_dma_latency', the
command 'exec' can avoid the file descriptor to be closed so we can
keep the constraint on cpu_dma_latency.

This patch also adds the info for reference docs for PM QoS and cpuidle
sysfs.

Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Reported-by: NKim Phillips <kim.phillips@arm.com>
Suggested-by: NMathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: NLeo Yan <leo.yan@linaro.org>
Signed-off-by: NMathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NTom Saeger <tom.saeger@oracle.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This patch adds a description to the stm_ftrace device source, an
interface for collecting Ftrace's function trace information via
STM devices.
Signed-off-by: NChunyan Zhang <chunyan.zhang@spreadtrum.com>
Signed-off-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>

The documentation of ftrace.txt has become rather outdated. Bring it closer
to reality of todays kernel.
Signed-off-by: NSteven Rostedt (VMware) <rostedt@goodmis.org>

The loadavg naming code still assumes that nohz == idle whereas its code
is actually handling well both nohz idle and nohz full.

So lets fix the naming according to what the code actually does, to
unconfuse the reader.
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
Acked-by: NRik van Riel <riel@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1497838322-10913-2-git-send-email-fweisbec@gmail.comSigned-off-by: NIngo Molnar <mingo@kernel.org>

Add detailed documentation for Coresight CPU debug driver, which
contains the info for driver implementation, Mike Leach excellent
summary for "clock and power domain". At the end some examples on how
to enable the debugging functionality are provided.
Suggested-by: NMike Leach <mike.leach@linaro.org>
Signed-off-by: NLeo Yan <leo.yan@linaro.org>
Signed-off-by: NMathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

When a kretprobe is installed on a kernel function, there is a maximum
limit of how many calls in parallel it can catch (aka "maxactive"). A
kernel module could call register_kretprobe() and initialize maxactive
(see example in samples/kprobes/kretprobe_example.c).

But that is not exposed to userspace and it is currently not possible to
choose maxactive when writing to /sys/kernel/debug/tracing/kprobe_events

The default maxactive can be as low as 1 on single-core with a
non-preemptive kernel. This is too low and we need to increase it not
only for recursive functions, but for functions that sleep or resched.

This patch updates the format of the command that can be written to
kprobe_events so that maxactive can be optionally specified.

I need this for a bpf program attached to the kretprobe of
inet_csk_accept, which can sleep for a long time.

This patch includes a basic selftest:

> # ./ftracetest -v  test.d/kprobe/
> === Ftrace unit tests ===
> [1] Kprobe dynamic event - adding and removing	[PASS]
> [2] Kprobe dynamic event - busy event check	[PASS]
> [3] Kprobe dynamic event with arguments	[PASS]
> [4] Kprobes event arguments with types	[PASS]
> [5] Kprobe dynamic event with function tracer	[PASS]
> [6] Kretprobe dynamic event with arguments	[PASS]
> [7] Kretprobe dynamic event with maxactive	[PASS]
>
> # of passed:  7
> # of failed:  0
> # of unresolved:  0
> # of untested:  0
> # of unsupported:  0
> # of xfailed:  0
> # of undefined(test bug):  0

BugLink: https://github.com/iovisor/bcc/issues/1072
Link: http://lkml.kernel.org/r/1491215782-15490-1-git-send-email-alban@kinvolk.ioAcked-by: NMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: NAlban Crequy <alban@kinvolk.io>
Signed-off-by: NSteven Rostedt (VMware) <rostedt@goodmis.org>

The nice value of 120 priority is 0.
Signed-off-by: NLiu Changcheng <changcheng.liu@intel.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Update kprobe tracer documentation to also mention that
NOKPROBE_SYMBOL() and nokprobe_inline add symbols to the kprobes
blacklist.
Signed-off-by: NNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: NMasami Hiramatsu <mhiramat@kernel.org>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/d924e20de099579ace4286e610304f054cd798db.1488991670.git.naveen.n.rao@linux.vnet.ibm.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

We have uses of CONFIG_UPROBE_EVENT and CONFIG_KPROBE_EVENT as
well as CONFIG_UPROBE_EVENTS and CONFIG_KPROBE_EVENTS.

Consistently use the plurals.
Signed-off-by: NAnton Blanchard <anton@samba.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@kernel.org
Cc: alexander.shishkin@linux.intel.com
Cc: davem@davemloft.net
Cc: sparclinux@vger.kernel.org
Link: http://lkml.kernel.org/r/20170216060050.20866-1-anton@ozlabs.orgSigned-off-by: NIngo Molnar <mingo@kernel.org>

Both mm_vmscan_lru_shrink_active and mm_vmscan_lru_isolate have changed
so the script needs to be update to reflect those changes

Link: http://lkml.kernel.org/r/20170105151737.GU21618@dhcp22.suse.czSigned-off-by: NMichal Hocko <mhocko@suse.com>
Acked-by: NHillf Danton <hillf.zj@alibaba-inc.com>
Acked-by: NMel Gorman <mgorman@suse.de>
Acked-by: NVlastimil Babka <vbabka@suse.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Documentation was missing for mono and mono_raw, add them and also for
the boot clock introduced in this series.
Signed-off-by: NJoel Fernandes <joelaf@google.com>
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NSteven Rostedt <rostedt@goodmis.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Link: http://lkml.kernel.org/r/1480372524-15181-8-git-send-email-john.stultz@linaro.orgSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

Signed-off-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>

This patch adds an explanation of how and when stm_source devices are
assigned STP masters and channels.
Signed-off-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>

This patch adds a description of the stm_source device class, an
interface for the kernel code to send traces over STM devices.

Cc: linux-api@vger.kernel.org
Cc: Chunyan Zhang <zhang.chunyan@linaro.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>

A new file is created:

 /sys/kernel/debug/tracing/trace_marker_raw

This allows for appications to create data structures and write the binary
data directly into it, and then read the trace data out from trace_pipe_raw
into the same type of data structure. This saves on converting numbers into
ASCII that would be required by trace_marker.
Suggested-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Use glob_match() to support flexible glob wildcards (*,?)
and character classes ([) for ftrace.
Since the full glob matching is slower than the current
partial matching routines(*pat, pat*, *pat*), this leaves
those routines and just add MATCH_GLOB for complex glob
expression.

e.g.
----
[root@localhost tracing]# echo 'sched*group' > set_ftrace_filter
[root@localhost tracing]# cat set_ftrace_filter
sched_free_group
sched_change_group
sched_create_group
sched_online_group
sched_destroy_group
sched_offline_group
[root@localhost tracing]# echo '[Ss]y[Ss]_*' > set_ftrace_filter
[root@localhost tracing]# head set_ftrace_filter
sys_arch_prctl
sys_rt_sigreturn
sys_ioperm
SyS_iopl
sys_modify_ldt
SyS_mmap
SyS_set_thread_area
SyS_get_thread_area
SyS_set_tid_address
sys_fork
----

Link: http://lkml.kernel.org/r/147566869501.29136.6462645009894738056.stgit@devboxAcked-by: NNamhyung Kim <namhyung@kernel.org>
Signed-off-by: NMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Current uprobetracer examples don't work as they use an incorrect syntax
- if no event name is specified then 'p/r' must not be followed by a
  colon
- if no event name is specified then the default event name will have a
  'p_' prefix, so use that in the '-' example as well
Signed-off-by: NMarcin Nowakowski <marcin.nowakowski@imgtec.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

Instead of having the hwlat detector thread stay on one CPU, have it migrate
across all the CPUs specified by tracing_cpumask. If the user modifies the
thread's CPU affinity, the migration will stop until the next instance that
the tracer is instantiated. The migration happens at the end of each window
(period).
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>