linux-kernel - Re: [PATCH 1/2] tracing: Fix cpu buffers unavailable due to 'record

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Date:   Sat, 5 Aug 2023 07:01:35 +0800
From:   kernel test robot <lkp@...el.com>
To:     Zheng Yejian <zhengyejian1@...wei.com>, rostedt@...dmis.org,
        mhiramat@...nel.org, vnagarnaik@...gle.com, shuah@...nel.org
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-trace-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH 1/2] tracing: Fix cpu buffers unavailable due to
 'record_disabled' messed

Hi Zheng,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on rostedt-trace/for-next v6.5-rc4 next-20230804]
[cannot apply to rostedt-trace/for-next-urgent]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Zheng-Yejian/tracing-Fix-cpu-buffers-unavailable-due-to-record_disabled-messed/20230804-204751
base:   linus/master
patch link:    https://lore.kernel.org/r/20230804124549.2562977-2-zhengyejian1%40huawei.com
patch subject: [PATCH 1/2] tracing: Fix cpu buffers unavailable due to 'record_disabled' messed
config: i386-defconfig (https://download.01.org/0day-ci/archive/20230805/202308050601.nsx7Z4CY-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230805/202308050601.nsx7Z4CY-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308050601.nsx7Z4CY-lkp@intel.com/

All errors (new ones prefixed by >>):

   kernel/trace/trace.c: In function 'tracing_set_cpumask':
>> kernel/trace/trace.c:5280:60: error: 'struct trace_array' has no member named 'max_buffer'; did you mean 'array_buffer'?
    5280 |                         ring_buffer_record_disable_cpu(tr->max_buffer.buffer, cpu);
         |                                                            ^~~~~~~~~~
         |                                                            array_buffer
   kernel/trace/trace.c:5286:59: error: 'struct trace_array' has no member named 'max_buffer'; did you mean 'array_buffer'?
    5286 |                         ring_buffer_record_enable_cpu(tr->max_buffer.buffer, cpu);
         |                                                           ^~~~~~~~~~
         |                                                           array_buffer


vim +5280 kernel/trace/trace.c

  5260	
  5261	int tracing_set_cpumask(struct trace_array *tr,
  5262				cpumask_var_t tracing_cpumask_new)
  5263	{
  5264		int cpu;
  5265	
  5266		if (!tr)
  5267			return -EINVAL;
  5268	
  5269		local_irq_disable();
  5270		arch_spin_lock(&tr->max_lock);
  5271		for_each_tracing_cpu(cpu) {
  5272			/*
  5273			 * Increase/decrease the disabled counter if we are
  5274			 * about to flip a bit in the cpumask:
  5275			 */
  5276			if (cpumask_test_cpu(cpu, tr->tracing_cpumask) &&
  5277					!cpumask_test_cpu(cpu, tracing_cpumask_new)) {
  5278				atomic_inc(&per_cpu_ptr(tr->array_buffer.data, cpu)->disabled);
  5279				ring_buffer_record_disable_cpu(tr->array_buffer.buffer, cpu);
> 5280				ring_buffer_record_disable_cpu(tr->max_buffer.buffer, cpu);
  5281			}
  5282			if (!cpumask_test_cpu(cpu, tr->tracing_cpumask) &&
  5283					cpumask_test_cpu(cpu, tracing_cpumask_new)) {
  5284				atomic_dec(&per_cpu_ptr(tr->array_buffer.data, cpu)->disabled);
  5285				ring_buffer_record_enable_cpu(tr->array_buffer.buffer, cpu);
  5286				ring_buffer_record_enable_cpu(tr->max_buffer.buffer, cpu);
  5287			}
  5288		}
  5289		arch_spin_unlock(&tr->max_lock);
  5290		local_irq_enable();
  5291	
  5292		cpumask_copy(tr->tracing_cpumask, tracing_cpumask_new);
  5293	
  5294		return 0;
  5295	}
  5296	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki