linux-kernel - Re: [patch 5/5] mm: vmstat_refresh: avoid queueing work item if cpu stats are clean

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Message-ID: <202107021208.hg5UUfbz-lkp@intel.com>
Date:   Fri, 2 Jul 2021 12:43:16 +0800
From:   kernel test robot <lkp@...el.com>
To:     Marcelo Tosatti <mtosatti@...hat.com>, linux-kernel@...r.kernel.org
Cc:     kbuild-all@...ts.01.org,
        Christoph Lameter <cl@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Frederic Weisbecker <frederic@...nel.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Nitesh Lal <nilal@...hat.com>,
        Marcelo Tosatti <mtosatti@...hat.com>
Subject: Re: [patch 5/5] mm: vmstat_refresh: avoid queueing work item if cpu
 stats are clean

Hi Marcelo,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tip/sched/core]
[also build test ERROR on tip/master v5.13]
[cannot apply to hnaz-linux-mm/master linus/master tip/core/entry next-20210701]
[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]

url:    https://github.com/0day-ci/linux/commits/Marcelo-Tosatti/optionally-sync-per-CPU-vmstats-counter-on-return-to-userspace/20210702-050826
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 031e3bd8986fffe31e1ddbf5264cccfe30c9abd7
config: sparc64-randconfig-s031-20210630 (attached as .config)
compiler: sparc64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/e9eaf0981b74e6c29c7691ffb25b6d6613632f4f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Marcelo-Tosatti/optionally-sync-per-CPU-vmstats-counter-on-return-to-userspace/20210702-050826
        git checkout e9eaf0981b74e6c29c7691ffb25b6d6613632f4f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=sparc64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   mm/vmstat.c: In function 'need_drain_remote_zones':
>> mm/vmstat.c:1909:9: error: 'struct per_cpu_pageset' has no member named 'expire'
    1909 |   if (!p->expire)
         |         ^~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for LOCKDEP
   Depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT && (FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86)
   Selected by
   - PROVE_LOCKING && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
   - LOCK_STAT && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
   - DEBUG_LOCK_ALLOC && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT


vim +1909 mm/vmstat.c

  1896	
  1897	#ifdef CONFIG_PROC_FS
  1898	static bool need_drain_remote_zones(int cpu)
  1899	{
  1900		struct zone *zone;
  1901	
  1902		for_each_populated_zone(zone) {
  1903			struct per_cpu_pageset *p;
  1904	
  1905			p = per_cpu_ptr(zone->pageset, cpu);
  1906	
  1907			if (!p->pcp.count)
  1908				continue;
> 1909			if (!p->expire)
  1910				continue;
  1911			if (zone_to_nid(zone) == cpu_to_node(cpu))
  1912				continue;
  1913	
  1914			return true;
  1915		}
  1916	
  1917		return false;
  1918	}
  1919	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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