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

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Date:   Sat, 4 Nov 2023 23:18:39 +0800
From:   kernel test robot <lkp@...el.com>
To:     Daniel Bristot de Oliveira <bristot@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>
Cc:     oe-kbuild-all@...ts.linux.dev,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Valentin Schneider <vschneid@...hat.com>,
        linux-kernel@...r.kernel.org,
        Luca Abeni <luca.abeni@...tannapisa.it>,
        Tommaso Cucinotta <tommaso.cucinotta@...tannapisa.it>,
        Thomas Gleixner <tglx@...utronix.de>,
        Joel Fernandes <joel@...lfernandes.org>,
        Vineeth Pillai <vineeth@...byteword.org>,
        Shuah Khan <skhan@...uxfoundation.org>, bristot@...nel.org,
        Phil Auld <pauld@...hat.com>
Subject: Re: [PATCH v5 7/7] sched/fair: Fair server interface

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-buildonly-randconfig-001-20231104 (https://download.01.org/0day-ci/archive/20231104/202311042329.PB1gTIL4-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231104/202311042329.PB1gTIL4-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/202311042329.PB1gTIL4-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from kernel/sched/build_utility.c:72:
>> kernel/sched/debug.c:342:57: warning: integer overflow in expression of type 'long int' results in '-100663296' [-Woverflow]
     342 | 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