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Date: Wed, 9 May 2018 06:28:50 +0800
From: kbuild test robot <lkp@...el.com>
To: Roman Gushchin <guro@...com>
Cc: kbuild-all@...org, linux-mm@...ck.org, kernel-team@...com,
Roman Gushchin <guro@...com>,
Johannes Weiner <hannes@...xchg.org>,
Michal Hocko <mhocko@...nel.org>,
Vladimir Davydov <vdavydov.dev@...il.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
linux-kernel@...r.kernel.org, cgroups@...r.kernel.org
Subject: Re: [PATCH] mm: fix oom_kill event handling
Hi Roman,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on mmotm/master]
[also build test ERROR on next-20180508]
[cannot apply to v4.17-rc4]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Roman-Gushchin/mm-fix-oom_kill-event-handling/20180509-051754
base: git://git.cmpxchg.org/linux-mmotm.git master
config: x86_64-randconfig-x010-201818 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
All error/warnings (new ones prefixed by >>):
In file included from include/linux/swap.h:9:0,
from include/linux/suspend.h:5,
from arch/x86/kernel/asm-offsets.c:13:
include/linux/memcontrol.h: In function 'memcg_memory_event_mm':
>> include/linux/memcontrol.h:746:10: error: implicit declaration of function 'mem_cgroup_from_task'; did you mean 'mem_cgroup_from_css'? [-Werror=implicit-function-declaration]
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^~~~~~~~~~~~~~~~~~~~
mem_cgroup_from_css
In file included from include/linux/srcu.h:33:0,
from include/linux/notifier.h:16,
from include/linux/memory_hotplug.h:7,
from include/linux/mmzone.h:777,
from include/linux/gfp.h:6,
from include/linux/slab.h:15,
from include/linux/crypto.h:24,
from arch/x86/kernel/asm-offsets.c:9:
>> include/linux/memcontrol.h:746:49: error: 'struct mm_struct' has no member named 'owner'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^
include/linux/rcupdate.h:351:10: note: in definition of macro '__rcu_dereference_check'
typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \
^
include/linux/rcupdate.h:546:28: note: in expansion of macro 'rcu_dereference_check'
#define rcu_dereference(p) rcu_dereference_check(p, 0)
^~~~~~~~~~~~~~~~~~~~~
>> include/linux/memcontrol.h:746:31: note: in expansion of macro 'rcu_dereference'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^~~~~~~~~~~~~~~
>> include/linux/memcontrol.h:746:49: error: 'struct mm_struct' has no member named 'owner'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^
include/linux/rcupdate.h:351:36: note: in definition of macro '__rcu_dereference_check'
typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \
^
include/linux/rcupdate.h:546:28: note: in expansion of macro 'rcu_dereference_check'
#define rcu_dereference(p) rcu_dereference_check(p, 0)
^~~~~~~~~~~~~~~~~~~~~
>> include/linux/memcontrol.h:746:31: note: in expansion of macro 'rcu_dereference'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^~~~~~~~~~~~~~~
In file included from arch/x86/include/asm/atomic.h:5:0,
from include/linux/atomic.h:5,
from include/linux/crypto.h:20,
from arch/x86/kernel/asm-offsets.c:9:
>> include/linux/memcontrol.h:746:49: error: 'struct mm_struct' has no member named 'owner'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^
include/linux/compiler.h:250:17: note: in definition of macro '__READ_ONCE'
union { typeof(x) __val; char __c[1]; } __u; \
^
include/linux/rcupdate.h:351:48: note: in expansion of macro 'READ_ONCE'
typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \
^~~~~~~~~
include/linux/rcupdate.h:488:2: note: in expansion of macro '__rcu_dereference_check'
__rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu)
^~~~~~~~~~~~~~~~~~~~~~~
include/linux/rcupdate.h:546:28: note: in expansion of macro 'rcu_dereference_check'
#define rcu_dereference(p) rcu_dereference_check(p, 0)
^~~~~~~~~~~~~~~~~~~~~
>> include/linux/memcontrol.h:746:31: note: in expansion of macro 'rcu_dereference'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^~~~~~~~~~~~~~~
>> include/linux/memcontrol.h:746:49: error: 'struct mm_struct' has no member named 'owner'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^
include/linux/compiler.h:252:22: note: in definition of macro '__READ_ONCE'
__read_once_size(&(x), __u.__c, sizeof(x)); \
^
include/linux/rcupdate.h:351:48: note: in expansion of macro 'READ_ONCE'
typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \
^~~~~~~~~
include/linux/rcupdate.h:488:2: note: in expansion of macro '__rcu_dereference_check'
__rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu)
^~~~~~~~~~~~~~~~~~~~~~~
include/linux/rcupdate.h:546:28: note: in expansion of macro 'rcu_dereference_check'
#define rcu_dereference(p) rcu_dereference_check(p, 0)
^~~~~~~~~~~~~~~~~~~~~
>> include/linux/memcontrol.h:746:31: note: in expansion of macro 'rcu_dereference'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^~~~~~~~~~~~~~~
>> include/linux/memcontrol.h:746:49: error: 'struct mm_struct' has no member named 'owner'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^
include/linux/compiler.h:252:42: note: in definition of macro '__READ_ONCE'
__read_once_size(&(x), __u.__c, sizeof(x)); \
^
include/linux/rcupdate.h:351:48: note: in expansion of macro 'READ_ONCE'
typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \
^~~~~~~~~
include/linux/rcupdate.h:488:2: note: in expansion of macro '__rcu_dereference_check'
__rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu)
^~~~~~~~~~~~~~~~~~~~~~~
include/linux/rcupdate.h:546:28: note: in expansion of macro 'rcu_dereference_check'
#define rcu_dereference(p) rcu_dereference_check(p, 0)
^~~~~~~~~~~~~~~~~~~~~
>> include/linux/memcontrol.h:746:31: note: in expansion of macro 'rcu_dereference'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^~~~~~~~~~~~~~~
>> include/linux/memcontrol.h:746:49: error: 'struct mm_struct' has no member named 'owner'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^
include/linux/compiler.h:254:30: note: in definition of macro '__READ_ONCE'
__read_once_size_nocheck(&(x), __u.__c, sizeof(x)); \
^
include/linux/rcupdate.h:351:48: note: in expansion of macro 'READ_ONCE'
typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \
^~~~~~~~~
include/linux/rcupdate.h:488:2: note: in expansion of macro '__rcu_dereference_check'
__rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu)
^~~~~~~~~~~~~~~~~~~~~~~
include/linux/rcupdate.h:546:28: note: in expansion of macro 'rcu_dereference_check'
#define rcu_dereference(p) rcu_dereference_check(p, 0)
^~~~~~~~~~~~~~~~~~~~~
>> include/linux/memcontrol.h:746:31: note: in expansion of macro 'rcu_dereference'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^~~~~~~~~~~~~~~
>> include/linux/memcontrol.h:746:49: error: 'struct mm_struct' has no member named 'owner'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^
include/linux/compiler.h:254:50: note: in definition of macro '__READ_ONCE'
__read_once_size_nocheck(&(x), __u.__c, sizeof(x)); \
^
include/linux/rcupdate.h:351:48: note: in expansion of macro 'READ_ONCE'
typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \
^~~~~~~~~
include/linux/rcupdate.h:488:2: note: in expansion of macro '__rcu_dereference_check'
__rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu)
^~~~~~~~~~~~~~~~~~~~~~~
include/linux/rcupdate.h:546:28: note: in expansion of macro 'rcu_dereference_check'
#define rcu_dereference(p) rcu_dereference_check(p, 0)
^~~~~~~~~~~~~~~~~~~~~
>> include/linux/memcontrol.h:746:31: note: in expansion of macro 'rcu_dereference'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^~~~~~~~~~~~~~~
In file included from include/linux/srcu.h:33:0,
from include/linux/notifier.h:16,
from include/linux/memory_hotplug.h:7,
from include/linux/mmzone.h:777,
from include/linux/gfp.h:6,
from include/linux/slab.h:15,
from include/linux/crypto.h:24,
from arch/x86/kernel/asm-offsets.c:9:
>> include/linux/memcontrol.h:746:49: error: 'struct mm_struct' has no member named 'owner'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^
include/linux/rcupdate.h:354:12: note: in definition of macro '__rcu_dereference_check'
((typeof(*p) __force __kernel *)(________p1)); \
^
include/linux/rcupdate.h:546:28: note: in expansion of macro 'rcu_dereference_check'
#define rcu_dereference(p) rcu_dereference_check(p, 0)
^~~~~~~~~~~~~~~~~~~~~
>> include/linux/memcontrol.h:746:31: note: in expansion of macro 'rcu_dereference'
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
^~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1
make[2]: Target '__build' not remade because of errors.
make[1]: *** [prepare0] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [sub-make] Error 2
vim +746 include/linux/memcontrol.h
736
737 static inline void memcg_memory_event_mm(struct mm_struct *mm,
738 enum memcg_memory_event event)
739 {
740 struct mem_cgroup *memcg;
741
742 if (mem_cgroup_disabled())
743 return;
744
745 rcu_read_lock();
> 746 memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
747 if (likely(memcg))
748 memcg_memory_event(memcg, event);
749 rcu_read_unlock();
750 }
751
---
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