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Date: Fri, 12 Mar 2021 01:48:23 +0800
From: kernel test robot <lkp@...el.com>
To: Muchun Song <songmuchun@...edance.com>, guro@...com,
hannes@...xchg.org, mhocko@...nel.org, akpm@...ux-foundation.org,
shakeelb@...gle.com, vdavydov.dev@...il.com
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
linux-mm@...ck.org, duanxiongchun@...edance.com,
Muchun Song <songmuchun@...edance.com>
Subject: Re: [PATCH v3 3/4] mm: memcontrol: use obj_cgroup APIs to charge
kmem pages
Hi Muchun,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on linus/master]
[also build test WARNING on v5.12-rc2 next-20210311]
[cannot apply to hnaz-linux-mm/master]
[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/Muchun-Song/Use-obj_cgroup-APIs-to-charge-kmem-pages/20210309-181121
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 144c79ef33536b4ecb4951e07dbc1f2b7fa99d32
config: i386-randconfig-s002-20210311 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.3-262-g5e674421-dirty
# https://github.com/0day-ci/linux/commit/202c922730a115143cf9e15ab26633f247e00229
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Muchun-Song/Use-obj_cgroup-APIs-to-charge-kmem-pages/20210309-181121
git checkout 202c922730a115143cf9e15ab26633f247e00229
# save the attached .config to linux build tree
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
"sparse warnings: (new ones prefixed by >>)"
mm/memcontrol.c:4194:21: sparse: sparse: incompatible types in comparison expression (different address spaces):
mm/memcontrol.c:4194:21: sparse: struct mem_cgroup_threshold_ary [noderef] __rcu *
mm/memcontrol.c:4194:21: sparse: struct mem_cgroup_threshold_ary *
mm/memcontrol.c:4196:21: sparse: sparse: incompatible types in comparison expression (different address spaces):
mm/memcontrol.c:4196:21: sparse: struct mem_cgroup_threshold_ary [noderef] __rcu *
mm/memcontrol.c:4196:21: sparse: struct mem_cgroup_threshold_ary *
mm/memcontrol.c:4352:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
mm/memcontrol.c:4352:9: sparse: struct mem_cgroup_threshold_ary [noderef] __rcu *
mm/memcontrol.c:4352:9: sparse: struct mem_cgroup_threshold_ary *
mm/memcontrol.c:4446:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
mm/memcontrol.c:4446:9: sparse: struct mem_cgroup_threshold_ary [noderef] __rcu *
mm/memcontrol.c:4446:9: sparse: struct mem_cgroup_threshold_ary *
mm/memcontrol.c:6002:23: sparse: sparse: incompatible types in comparison expression (different address spaces):
mm/memcontrol.c:6002:23: sparse: struct task_struct [noderef] __rcu *
mm/memcontrol.c:6002:23: sparse: struct task_struct *
>> mm/memcontrol.c:854:6: sparse: sparse: context imbalance in '__mod_lruvec_page_state' - different lock contexts for basic block
mm/memcontrol.c: note: in included file:
include/linux/memcontrol.h:707:9: sparse: sparse: context imbalance in 'lock_page_lruvec' - wrong count at exit
include/linux/memcontrol.h:707:9: sparse: sparse: context imbalance in 'lock_page_lruvec_irq' - wrong count at exit
include/linux/memcontrol.h:707:9: sparse: sparse: context imbalance in 'lock_page_lruvec_irqsave' - wrong count at exit
mm/memcontrol.c:2137:19: sparse: sparse: context imbalance in 'lock_page_memcg' - wrong count at exit
mm/memcontrol.c:2199:17: sparse: sparse: context imbalance in '__unlock_page_memcg' - unexpected unlock
mm/memcontrol.c:5853:28: sparse: sparse: context imbalance in 'mem_cgroup_count_precharge_pte_range' - unexpected unlock
mm/memcontrol.c:6047:36: sparse: sparse: context imbalance in 'mem_cgroup_move_charge_pte_range' - unexpected unlock
vim +/__mod_lruvec_page_state +854 mm/memcontrol.c
eedc4e5a142cc3 Roman Gushchin 2020-08-06 853
c47d5032ed3002 Shakeel Butt 2020-12-14 @854 void __mod_lruvec_page_state(struct page *page, enum node_stat_item idx,
c47d5032ed3002 Shakeel Butt 2020-12-14 855 int val)
c47d5032ed3002 Shakeel Butt 2020-12-14 856 {
c47d5032ed3002 Shakeel Butt 2020-12-14 857 struct page *head = compound_head(page); /* rmap on tail pages */
286d6cff5d9973 Muchun Song 2021-03-09 858 struct mem_cgroup *memcg;
c47d5032ed3002 Shakeel Butt 2020-12-14 859 pg_data_t *pgdat = page_pgdat(page);
c47d5032ed3002 Shakeel Butt 2020-12-14 860 struct lruvec *lruvec;
c47d5032ed3002 Shakeel Butt 2020-12-14 861
202c922730a115 Muchun Song 2021-03-09 862 if (PageMemcgKmem(head)) {
202c922730a115 Muchun Song 2021-03-09 863 rcu_read_lock();
202c922730a115 Muchun Song 2021-03-09 864 memcg = obj_cgroup_memcg(page_objcg(page));
202c922730a115 Muchun Song 2021-03-09 865 } else {
202c922730a115 Muchun Song 2021-03-09 866 memcg = page_memcg(head);
202c922730a115 Muchun Song 2021-03-09 867 /*
202c922730a115 Muchun Song 2021-03-09 868 * Untracked pages have no memcg, no lruvec. Update only the
202c922730a115 Muchun Song 2021-03-09 869 * node.
202c922730a115 Muchun Song 2021-03-09 870 */
d635a69dd4981c Linus Torvalds 2020-12-15 871 if (!memcg) {
c47d5032ed3002 Shakeel Butt 2020-12-14 872 __mod_node_page_state(pgdat, idx, val);
c47d5032ed3002 Shakeel Butt 2020-12-14 873 return;
c47d5032ed3002 Shakeel Butt 2020-12-14 874 }
202c922730a115 Muchun Song 2021-03-09 875 }
c47d5032ed3002 Shakeel Butt 2020-12-14 876
d635a69dd4981c Linus Torvalds 2020-12-15 877 lruvec = mem_cgroup_lruvec(memcg, pgdat);
c47d5032ed3002 Shakeel Butt 2020-12-14 878 __mod_lruvec_state(lruvec, idx, val);
202c922730a115 Muchun Song 2021-03-09 879
202c922730a115 Muchun Song 2021-03-09 880 if (PageMemcgKmem(head))
202c922730a115 Muchun Song 2021-03-09 881 rcu_read_unlock();
c47d5032ed3002 Shakeel Butt 2020-12-14 882 }
f0c0c115fb8194 Shakeel Butt 2020-12-14 883 EXPORT_SYMBOL(__mod_lruvec_page_state);
c47d5032ed3002 Shakeel Butt 2020-12-14 884
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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