Re: [PATCH 6.6 3/4] rtla/timerlat_hist: Set OSNOISE_WORKLOAD for kernel threads

[Sasha Levin <sashal@kernel.org>]

[ Sasha's backport helper bot ]

Hi,

✅ All tests passed successfully. No issues detected.
No action required from the submitter.

The upstream commit SHA1 provided is correct: d8d866171a414ed88bd0d720864095fd75461134

Note: The patch differs from the upstream commit:
---
1:  d8d866171a414 ! 1:  2b6c95fecd276 rtla/timerlat_hist: Set OSNOISE_WORKLOAD for kernel threads
    @@ Metadata
      ## Commit message ##
         rtla/timerlat_hist: Set OSNOISE_WORKLOAD for kernel threads
     
    +    commit d8d866171a414ed88bd0d720864095fd75461134 upstream.
    +
         When using rtla timerlat with userspace threads (-u or -U), rtla
         disables the OSNOISE_WORKLOAD option in
         /sys/kernel/tracing/osnoise/options. This option is not re-enabled in a
    @@ Commit message
         Fixes: ed774f7481fa ("rtla/timerlat_hist: Add timerlat user-space support")
         Signed-off-by: Tomas Glozar <tglozar@redhat.com>
         Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
    +    [ params->kernel_workload does not exist in 6.6, use
    +    !params->user_hist ]
    +    Signed-off-by: Tomas Glozar <tglozar@redhat.com>
     
      ## tools/tracing/rtla/src/timerlat_hist.c ##
     @@ tools/tracing/rtla/src/timerlat_hist.c: timerlat_hist_apply_config(struct osnoise_tool *tool, struct timerlat_hist_param
    - 		}
    + 		auto_house_keeping(&params->monitored_cpus);
      	}
      
     -	if (params->user_hist) {
    @@ tools/tracing/rtla/src/timerlat_hist.c: timerlat_hist_apply_config(struct osnois
     +	* On kernels without support, user threads will have already failed
     +	* on missing timerlat_fd, and kernel threads do not need it.
     +	*/
    -+	retval = osnoise_set_workload(tool->context, params->kernel_workload);
    ++	retval = osnoise_set_workload(tool->context, !params->user_hist);
     +	if (retval < -1) {
     +		err_msg("Failed to set OSNOISE_WORKLOAD option\n");
     +		goto out_err;
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.6.y        |  Success    |  Success   |