Re: [PATCH v5 7/7] sched/fair: Fair server interface

From: kernel test robot <lkp@intel.com>
To: Daniel Bristot de Oliveira <bristot@kernel.org>,
	Ingo Molnar <mingo@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Juri Lelli <juri.lelli@redhat.com>,
	Vincent Guittot <vincent.guittot@linaro.org>
Cc: oe-kbuild-all@lists.linux.dev,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
	Daniel Bristot de Oliveira <bristot@redhat.com>,
	Valentin Schneider <vschneid@redhat.com>,
	linux-kernel@vger.kernel.org,
	Luca Abeni <luca.abeni@santannapisa.it>,
	Tommaso Cucinotta <tommaso.cucinotta@santannapisa.it>,
	Thomas Gleixner <tglx@linutronix.de>,
	Joel Fernandes <joel@joelfernandes.org>,
	Vineeth Pillai <vineeth@bitbyteword.org>,
	Shuah Khan <skhan@linuxfoundation.org>,
	bristot@kernel.org, Phil Auld <pauld@redhat.com>
Subject: Re: [PATCH v5 7/7] sched/fair: Fair server interface
Date: Sun, 5 Nov 2023 08:55:10 +0800	[thread overview]
Message-ID: <202311050844.d45KQ8sK-lkp@intel.com> (raw)
In-Reply-To: <26adad2378c8b15533e4f6216c2863341e587f57.1699095159.git.bristot@kernel.org>

Hi Daniel,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tip/sched/core]
[also build test WARNING on tip/master linus/master next-20231103]
[cannot apply to tip/auto-latest v6.6]
[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/Daniel-Bristot-de-Oliveira/sched-Unify-runtime-accounting-across-classes/20231104-201952
base:   tip/sched/core
patch link:    https://lore.kernel.org/r/26adad2378c8b15533e4f6216c2863341e587f57.1699095159.git.bristot%40kernel.org
patch subject: [PATCH v5 7/7] sched/fair: Fair server interface
config: i386-randconfig-013-20231105 (https://download.01.org/0day-ci/archive/20231105/202311050844.d45KQ8sK-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231105/202311050844.d45KQ8sK-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311050844.d45KQ8sK-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from kernel/sched/build_utility.c:72:0:
>> kernel/sched/debug.c:342:57: warning: integer overflow in expression [-Woverflow]
    static unsigned long fair_server_period_max = (1 << 22) * NSEC_PER_USEC; /* ~4 seconds */
                                                            ^

vim +342 kernel/sched/debug.c

   341	
 > 342	static unsigned long fair_server_period_max = (1 << 22) * NSEC_PER_USEC; /* ~4 seconds */
   343	static unsigned long fair_server_period_min = (100) * NSEC_PER_USEC;     /* 100 us */
   344	

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