linux-kernel - Re: [PATCH v2 2/2] mm, thp: avoid unnecessary swapin in khugepaged

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Message-ID: <201603131723.H6YMc2iP%fengguang.wu@intel.com>
Date:	Sun, 13 Mar 2016 17:45:05 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Ebru Akagunduz <ebru.akagunduz@...il.com>
Cc:	kbuild-all@...org, linux-mm@...ck.org, hughd@...gle.com,
	riel@...hat.com, akpm@...ux-foundation.org,
	kirill.shutemov@...ux.intel.com, n-horiguchi@...jp.nec.com,
	aarcange@...hat.com, iamjoonsoo.kim@....com, gorcunov@...nvz.org,
	linux-kernel@...r.kernel.org, mgorman@...e.de, rientjes@...gle.com,
	vbabka@...e.cz, aneesh.kumar@...ux.vnet.ibm.com,
	hannes@...xchg.org, mhocko@...e.cz, boaz@...xistor.com,
	Ebru Akagunduz <ebru.akagunduz@...il.com>
Subject: Re: [PATCH v2 2/2] mm, thp: avoid unnecessary swapin in khugepaged

Hi Ebru,

[auto build test ERROR on next-20160311]
[cannot apply to v4.5-rc7 v4.5-rc6 v4.5-rc5 v4.5-rc7]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Ebru-Akagunduz/mm-vmstat-calculate-particular-vm-event/20160313-173055
config: i386-randconfig-x009-201611 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   mm/huge_memory.c: In function 'collapse_huge_page':
>> mm/huge_memory.c:2498:20: error: implicit declaration of function 'sum_vm_event' [-Werror=implicit-function-declaration]
     curr_allocstall = sum_vm_event(ALLOCSTALL);
                       ^
   cc1: some warnings being treated as errors

vim +/sum_vm_event +2498 mm/huge_memory.c

  2492		if (!pmd) {
  2493			result = SCAN_PMD_NULL;
  2494			goto out;
  2495		}
  2496	
  2497		swap = get_mm_counter(mm, MM_SWAPENTS);
> 2498		curr_allocstall = sum_vm_event(ALLOCSTALL);
  2499		/*
  2500		 * When system under pressure, don't swapin readahead.
  2501		 * So that avoid unnecessary resource consuming.

---
0-DAY kernel test infrastructure                Open Source Technology Center
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