Merge drm/drm-fixes into drm-misc-fixes

Updating drm-misc-fixes to the state of v6.17-rc1. Begins a new release
cycle.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge tag 'trace-tools-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull tracing tools updates from Steven Rostedt:

- Introduce enum timerlat_tracing_mode

Now that

Merge tag 'trace-tools-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull tracing tools updates from Steven Rostedt:

- Introduce enum timerlat_tracing_mode

Now that BPF based sampling has been added to timerlat, add an enum
to represent which mode timerlat is running in

- Add action on timelat threshold feature

A new option, --on-threshold, is added, taking an argument that
further specifies the action. Actions added in this patch are:

- trace[,file=<filename>]: Saves tracefs buffer, optionally taking a
filename
- signal,num=<sig>,pid=<pid>: Sends signal to process. "parent" might
be specified instead of number to send signal to parent process
- shell,command=<command>: Execute shell command

- Allow resuming tracing in timerlat bpf

rtla-timerlat BPF program uses a global variable stored in a .bss
section to store whether tracing has been stopped. Map it to allow it
to resume tracing after it has been stopped

- Add continue action to timerlat

Introduce option to resume tracing after a latency threshold
overflow. The option is implemented as an action named "continue"

- Add action on end feature to timerlat

Implement actions on end next to actions on threshold. A new option,
--on-end is added, parallel to --on-threshold. Instead of being
executed whenever a latency threshold is reached, it is executed at
the end of the measurement

- Have rtla tests check output with grep

Add argument to the check command in the test suite that takes a
regular expression that the output of rtla command is checked
against. This allows testing for specific information in rtla output
in addition to checking the return value

- Add tests for timerlat actions

- Update the documentation for the new features

* tag 'trace-tools-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
rtla/tests: Test timerlat -P option using actions
rtla/tests: Add grep checks for base test cases
Documentation/rtla: Add actions feature
rtla/tests: Limit duration to maximum of 10s
rtla/tests: Add tests for actions
rtla/tests: Check rtla output with grep
rtla/timerlat: Add action on end feature
rtla/timerlat: Add continue action
rtla/timerlat_bpf: Allow resuming tracing
rtla/timerlat: Add action on threshold feature
rtla/timerlat: Introduce enum timerlat_tracing_mode

show more ...

rtla/timerlat: Add continue action

Introduce option to resume tracing after a latency threshold overflow.
The option is implemented as an action named "continue".

Example:
$ rtla timerlat top -q -T

rtla/timerlat: Add continue action

Introduce option to resume tracing after a latency threshold overflow.
The option is implemented as an action named "continue".

Example:
$ rtla timerlat top -q -T 200 -d 1s --on-threshold \
exec,command="echo Threshold" --on-threshold continue
Threshold
Threshold
Threshold
Timer Latency
...

The feature is supported for both hist and top. After the continue
action is executed, processing of the list of actions is stopped and
tracing is resumed.

Cc: John Kacur <jkacur@redhat.com>
Cc: Luis Goncalves <lgoncalv@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Chang Yin <cyin@redhat.com>
Cc: Costa Shulyupin <costa.shul@redhat.com>
Cc: Crystal Wood <crwood@redhat.com>
Cc: Gabriele Monaco <gmonaco@redhat.com>
Link: https://lore.kernel.org/20250626123405.1496931-5-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

show more ...

rtla/timerlat: Add action on threshold feature

Extend the functionality provided by the -t/--trace option, which
triggers saving the contents of a tracefs buffer after tracing is
stopped, to support

rtla/timerlat: Add action on threshold feature

Extend the functionality provided by the -t/--trace option, which
triggers saving the contents of a tracefs buffer after tracing is
stopped, to support implementing arbitrary actions.

A new option, --on-threshold, is added, taking an argument
that further specifies the action. Actions added in this patch are:

- trace[,file=<filename>]: Saves tracefs buffer, optionally taking a
filename.
- signal,num=<sig>,pid=<pid>: Sends signal to process. "parent" might
be specified instead of number to send signal to parent process.
- shell,command=<command>: Execute shell command.

Multiple actions may be specified and will be executed in order,
including multiple actions of the same type. Trace output requested via
-t and -a now adds a trace action to the end of the list.

If an action fails, the following actions are not executed. For
example, this command:

$ rtla timerlat -T 20 --on-threshold trace \
--on-threshold shell,command="grep ipi_send timerlat_trace.txt" \
--on-threshold signal,num=2,pid=parent

will send signal 2 (SIGINT) to parent process, but only if saved trace
contains the text "ipi_send".

This way, the feature can be used for flexible reactions on latency
spikes, and allows combining rtla with other tooling like perf.

Cc: John Kacur <jkacur@redhat.com>
Cc: Luis Goncalves <lgoncalv@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Chang Yin <cyin@redhat.com>
Cc: Costa Shulyupin <costa.shul@redhat.com>
Cc: Crystal Wood <crwood@redhat.com>
Cc: Gabriele Monaco <gmonaco@redhat.com>
Link: https://lore.kernel.org/20250626123405.1496931-3-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

show more ...