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Date: Wed, 30 Nov 2016 12:28:01 +0000
From: Sudeep Holla <sudeep.holla@....com>
To: paulmck@...ux.vnet.ibm.com, Michal Hocko <mhocko@...nel.org>
Cc: Sudeep Holla <sudeep.holla@....com>,
Boris Zhmurov <bb@...nelpanic.ru>,
Andrew Morton <akpm@...ux-foundation.org>,
Johannes Weiner <hannes@...xchg.org>,
Vlastimil Babka <vbabka@...e.cz>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org,
kernel test robot <xiaolong.ye@...el.com>
Subject: Re: [lkp] [mm] e7c1db75fe:
BUG:sleeping_function_called_from_invalid_context_at_mm/page_alloc.c
On 30/11/16 07:40, Paul E. McKenney wrote:
> On Wed, Nov 30, 2016 at 08:16:02AM +0100, Michal Hocko wrote:
>> On Tue 29-11-16 11:14:48, Paul E. McKenney wrote:
>>> On Tue, Nov 29, 2016 at 05:21:19PM +0000, Sudeep Holla wrote:
>>>> On Sun, Nov 27, 2016 at 6:16 PM, kernel test robot
>>>> <xiaolong.ye@...el.com> wrote:
>>>>>
>>>>> FYI, we noticed the following commit:
>>>>>
>>>>> commit e7c1db75fed821a961ce1ca2b602b08e75de0cd8 ("mm: Prevent __alloc_pages_nodemask() RCU CPU stall warnings")
>>>>> https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
>>>>>
>>>>> in testcase: boot
>>>>>
>>>>> on test machine: qemu-system-x86_64 -enable-kvm -cpu Nehalem -smp 2 -m 1G
>>>>>
>>>>> caused below changes:
>>>>>
>>>> [...]
>>>>
>>>>> [ 8.953192] BUG: sleeping function called from invalid context at mm/page_alloc.c:3746
>>>>> [ 8.956353] in_atomic(): 1, irqs_disabled(): 1, pid: 0, name: swapper/0
>>>>
>>>> I am observing similar BUG/backtrace even on ARM64 platform.
>>>
>>> Does the (untested) patch below help?
Yes it didn't work for me either. Adding the log from my setup(in case
it's useful)
Regards,
Sudeep
--->8
BUG: sleeping function called from invalid context at mm/page_alloc.c:3775
in_atomic(): 1, irqs_disabled(): 128, pid: 1, name: swapper/0
1 lock held by swapper/0/1:
#0: (&sig->cred_guard_mutex ){+.+.+.}, at: prepare_bprm_creds+0x2c/0x70
irq event stamp: 508063
hardirqs last enabled at (508062): __netdev_alloc_skb+0x11c/0x160
hardirqs last disabled at (508063): __slab_alloc.isra.22.constprop.26+0x30/0x90
softirqs last enabled at (508052): xprt_end_transmit+0x4c/0x60
softirqs last disabled at (508053): do_softirq.part.4+0x7c/0x98
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.9.0-rc7-next-20161130-00010-ga0f9af725c5d #218
Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Nov 29 2016
Call trace:
dump_backtrace+0x0/0x260
show_stack+0x24/0x30
dump_stack+0xac/0xe8
___might_sleep+0x14c/0x1f8
__alloc_pages_nodemask+0x414/0xef0
new_slab+0xa4/0x558
___slab_alloc.constprop.27+0x2f8/0x378
__slab_alloc.isra.22.constprop.26+0x4c/0x90
kmem_cache_alloc+0x388/0x430
__build_skb+0x34/0xc0
__netdev_alloc_skb+0xf0/0x160
smsc911x_poll+0x9c/0x280
net_rx_action+0x200/0x510
__do_softirq+0x12c/0x6fc
do_softirq.part.4+0x7c/0x98
__local_bh_enable_ip+0x110/0x138
_raw_spin_unlock_bh+0x40/0x50
xprt_end_transmit+0x4c/0x60
call_transmit_status+0x58/0x100
call_transmit+0x178/0x1e8
__rpc_execute+0xa0/0x680
rpc_execute+0xb4/0x298
rpc_run_task+0x11c/0x168
nfs4_call_sync_sequence+0x6c/0x98
_nfs4_proc_access+0xe8/0x170
nfs4_proc_access+0x88/0x2a0
nfs_do_access+0x458/0x778
nfs_permission+0x2c8/0x2f8
__inode_permission+0xa0/0x100
inode_permission+0x2c/0x70
link_path_walk+0x98/0x518
path_openat+0x74/0x340
do_filp_open+0x70/0xf8
do_open_execat+0x70/0x1a0
do_execveat_common.isra.14+0x288/0x998
do_execve+0x44/0x58
run_init_process+0x38/0x48
try_to_run_init_process+0x20/0x58
kernel_init+0xb4/0x108
ret_from_fork+0x10/0x30
BUG: sleeping function called from invalid context at mm/page_alloc.c:3775
in_atomic(): 1, irqs_disabled(): 128, pid: 98, name: kworker/0:1
3 locks held by kworker/0:1/98:
#0: ("rpciod" ){.+.+..} , at: process_one_work+0x198/0x818
#1: ((&task->u.tk_work)){+.+...}, at: process_one_work+0x198/0x818
#2: (&(&clnt->cl_lock)->rlock){+.+...}, at: rpc_task_release_client+0x38/0xb0
irq event stamp: 31359
hardirqs last enabled at (31358): _raw_spin_unlock_irqrestore+0x84/0x90
hardirqs last disabled at (31359): __netdev_alloc_skb+0xa8/0x160
softirqs last enabled at (31252): rpc_wake_up_first_on_wq+0x84/0x200
softirqs last disabled at (31255): irq_exit+0xe8/0x148
CPU: 0 PID: 98 Comm: kworker/0:1 Tainted: G W 4.9.0-rc7-next-20161130-00010-ga0f9af725c5d #218
Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Nov 29 2016
Workqueue: rpciod rpc_async_schedule
Call trace:
dump_backtrace+0x0/0x260
show_stack+0x24/0x30
dump_stack+0xac/0xe8
___might_sleep+0x14c/0x1f8
__alloc_pages_nodemask+0x414/0xef0
__alloc_page_frag+0xa8/0x158
__netdev_alloc_skb+0xcc/0x160
smsc911x_poll+0x9c/0x280
net_rx_action+0x200/0x510
__do_softirq+0x12c/0x6fc
irq_exit+0xe8/0x148
__handle_domain_irq+0x6c/0xc0
gic_handle_irq+0x5c/0xb0
BUG: sleeping function called from invalid context at mm/page_alloc.c:3775
in_atomic(): 1, irqs_disabled(): 128, pid: 1326, name: kworker/0:1H
4 locks held by kworker/0:1H/1326:
#0: ("xprtiod"){.+.+.+}, at: process_one_work+0x198/0x818
#1: ((&transport->recv_worker)){+.+...}, at: process_one_work+0x198/0x818
#2: (&new->recv_mutex){+.+...}, at: xs_tcp_data_receive_workfn+0x4c/0x2f8
#3: (sk_lock-AF_INET-RPC){+.+...}, at: xs_tcp_data_receive_workfn+0x74/0x2f8
irq event stamp: 41851
hardirqs last enabled at (41850): _raw_spin_unlock_irqrestore+0x84/0x90
hardirqs last disabled at (41851): __netdev_alloc_skb+0xa8/0x160
softirqs last enabled at (41836): xs_tcp_data_recv+0x580/0x960
softirqs last disabled at (41843): irq_exit+0xe8/0x148
CPU: 0 PID: 1326 Comm: kworker/0:1H Tainted: G W 4.9.0-rc7-next-20161130-00010-ga0f9af725c5d #218
Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Nov 29 2016
Workqueue: xprtiod xs_tcp_data_receive_workfn
Call trace:
dump_backtrace+0x0/0x260
show_stack+0x24/0x30
dump_stack+0xac/0xe8
___might_sleep+0x14c/0x1f8
__alloc_pages_nodemask+0x414/0xef0
__alloc_page_frag+0xa8/0x158
__netdev_alloc_skb+0xcc/0x160
smsc911x_poll+0x9c/0x280
net_rx_action+0x200/0x510
__do_softirq+0x12c/0x6fc
irq_exit+0xe8/0x148
__handle_domain_irq+0x6c/0xc0
gic_handle_irq+0x5c/0xb0
Exception stack(0xffff800974d4b9e0 to 0xffff800974d4bb10)
b9e0: ffff800974c59600 000000000001fc5a 0000800976db6000 fffffffffffffe50
ba00: 0000000000000004 0000000000000040 0000800976db6000 ffff000009353c38
ba20: 0000000000000001 00010643c0000000 c000000000100400 0010080000012144
ba40: 00012145c0000000 c000000000101000 0010180000010646 0000000000000000
ba60: 0000000000000000 0000000000000000 0000000000000000 ffff7e0025d34600
ba80: 00000000009f4d18 0000000000000040 0000000000000003 0000000000000000
baa0: ffff7e0025d34800 0000000000000001 000000000018bce1 ffff800974c0c830
bac0: 0000000000000000 ffff800974d4bb10 ffff00000821b9bc ffff800974d4bb10
bae0: ffff00000821b9c0 0000000060000045 0000000000000040 0000000000000000
bb00: ffffffffffffffff ffff00000821b9bc
el1_irq+0xb8/0x130
__free_pages_ok+0x1d0/0x4b0
__free_page_frag+0x78/0x88
skb_free_head+0x3c/0x48
skb_release_data+0xd0/0xf8
skb_release_all+0x30/0x40
__kfree_skb+0x20/0x38
tcp_read_sock+0x118/0x1d8
xs_tcp_data_receive_workfn+0x84/0x2f8
process_one_work+0x248/0x818
worker_thread+0x54/0x438
kthread+0xe0/0xf8
ret_from_fork+0x10/0x30
BUG: sleeping function called from invalid context at mm/page_alloc.c:3775
in_atomic(): 1, irqs_disabled(): 128, pid: 6, name: ksoftirqd/0
no locks held by ksoftirqd/0/6.
irq event stamp: 76667
hardirqs last enabled at (76666): _raw_spin_unlock_irqrestore+0x84/0x90
hardirqs last disabled at (76667): __netdev_alloc_skb+0xa8/0x160
softirqs last enabled at (76506): __do_softirq+0x5f4/0x6fc
softirqs last disabled at (76511): run_ksoftirqd+0x40/0xb0
CPU: 0 PID: 6 Comm: ksoftirqd/0 Tainted: G W 4.9.0-rc7-next-20161130-00010-ga0f9af725c5d #218
Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Nov 29 2016
Call trace:
dump_backtrace+0x0/0x260
show_stack+0x24/0x30
dump_stack+0xac/0xe8
___might_sleep+0x14c/0x1f8
__alloc_pages_nodemask+0x414/0xef0
__alloc_page_frag+0xa8/0x158
__netdev_alloc_skb+0xcc/0x160
smsc911x_poll+0x9c/0x280
net_rx_action+0x200/0x510
__do_softirq+0x12c/0x6fc
run_ksoftirqd+0x40/0xb0
smpboot_thread_fn+0x1d4/0x308
kthread+0xe0/0xf8
ret_from_fork+0x10/0x30
BUG: sleeping function called from invalid context at mm/page_alloc.c:3775
in_atomic(): 1, irqs_disabled(): 128, pid: 6, name: ksoftirqd/0
no locks held by ksoftirqd/0/6.
irq event stamp: 121831
hardirqs last enabled at (121830): _raw_spin_unlock_irqrestore+0x84/0x90
hardirqs last disabled at (121831): __netdev_alloc_skb+0xa8/0x160
softirqs last enabled at (121742): __do_softirq+0x5f4/0x6fc
softirqs last disabled at (121747): run_ksoftirqd+0x40/0xb0
CPU: 0 PID: 6 Comm: ksoftirqd/0 Tainted: G W 4.9.0-rc7-next-20161130-00010-ga0f9af725c5d #218
Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Nov 29 2016
Call trace:
dump_backtrace+0x0/0x260
show_stack+0x24/0x30
dump_stack+0xac/0xe8
___might_sleep+0x14c/0x1f8
__alloc_pages_nodemask+0x414/0xef0
__alloc_page_frag+0xa8/0x158
__netdev_alloc_skb+0xcc/0x160
smsc911x_poll+0x9c/0x280
net_rx_action+0x200/0x510
__do_softirq+0x12c/0x6fc
run_ksoftirqd+0x40/0xb0
smpboot_thread_fn+0x1d4/0x308
kthread+0xe0/0xf8
ret_from_fork+0x10/0x30
NET: Registered protocol family 10
===============================
suspicious RCU usage. ]
4.9.0-rc7-next-20161130-00010-ga0f9af725c5d #218 Tainted: G W
-------------------------------
kernel/sched/core.c:7747 Illegal context switch in RCU-bh read-side critical section!
other info that might help us debug this:
rcu_scheduler_active = 1, debug_locks = 1
3 locks held by systemd/1:
#0: (rtnl_mutex ){+.+.+.}, at: rtnl_lock+0x20/0x28
#1: (rcu_read_lock_bh){......}, at: ipv6_add_addr+0x70/0x548 [ipv6]
#2: (addrconf_hash_lock){+.....}, at: ipv6_add_addr+0x194/0x548 [ipv6]
stack backtrace:
CPU: 3 PID: 1 Comm: systemd Tainted: G W 4.9.0-rc7-next-20161130-00010-ga0f9af725c5d #218
Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Nov 29 2016
Call trace:
dump_backtrace+0x0/0x260
show_stack+0x24/0x30
dump_stack+0xac/0xe8
lockdep_rcu_suspicious+0xcc/0x110
___might_sleep+0x1e0/0x1f8
__alloc_pages_nodemask+0x414/0xef0
new_slab+0xa4/0x558
___slab_alloc.constprop.27+0x2f8/0x378
__slab_alloc.isra.22.constprop.26+0x4c/0x90
kmem_cache_alloc+0x388/0x430
dst_alloc+0x5c/0xb0
__ip6_dst_alloc+0x3c/0xa0 [ipv6]
ip6_dst_alloc+0x38/0x108 [ipv6]
addrconf_dst_alloc+0x4c/0x130 [ipv6]
ipv6_add_addr+0x274/0x548 [ipv6]
add_addr+0x4c/0xd8 [ipv6]
addrconf_notify+0x5c4/0xa98 [ipv6]
register_netdevice_notifier+0x1e0/0x1e8
addrconf_init+0xb8/0x270 [ipv6]
inet6_init+0x180/0x330 [ipv6]
do_one_initcall+0x44/0x138
do_init_module+0x64/0x1d0
load_module+0x1230/0x1560
SyS_finit_module+0x120/0x130
el0_svc_naked+0x24/0x28
BUG: sleeping function called from invalid context at mm/page_alloc.c:3775
in_atomic(): 1, irqs_disabled(): 128, pid: 1, name: systemd
3 locks held by systemd/1:
#0: (rtnl_mutex){+.+.+.} , at: rtnl_lock+0x20/0x28
#1: (rcu_read_lock_bh){......}, at: ipv6_add_addr+0x70/0x548 [ipv6]
#2: (addrconf_hash_lock){+.....}, at: ipv6_add_addr+0x194/0x548 [ipv6]
irq event stamp: 619543
hardirqs last enabled at (619541): __local_bh_enable_ip+0x88/0x138
hardirqs last disabled at (619543): __slab_alloc.isra.22.constprop.26+0x30/0x90
softirqs last enabled at (619540): ipv6_mc_up+0x4c/0x58 [ipv6]
softirqs last disabled at (619542): ipv6_add_addr+0x70/0x548 [ipv6]
CPU: 3 PID: 1 Comm: systemd Tainted: G W 4.9.0-rc7-next-20161130-00010-ga0f9af725c5d #218
Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Nov 29 2016
Call trace:
dump_backtrace+0x0/0x260
show_stack+0x24/0x30
dump_stack+0xac/0xe8
___might_sleep+0x14c/0x1f8
__alloc_pages_nodemask+0x414/0xef0
new_slab+0xa4/0x558
___slab_alloc.constprop.27+0x2f8/0x378
__slab_alloc.isra.22.constprop.26+0x4c/0x90
kmem_cache_alloc+0x388/0x430
dst_alloc+0x5c/0xb0
__ip6_dst_alloc+0x3c/0xa0 [ipv6]
ip6_dst_alloc+0x38/0x108 [ipv6]
addrconf_dst_alloc+0x4c/0x130 [ipv6]
ipv6_add_addr+0x274/0x548 [ipv6]
add_addr+0x4c/0xd8 [ipv6]
addrconf_notify+0x5c4/0xa98 [ipv6]
register_netdevice_notifier+0x1e0/0x1e8
addrconf_init+0xb8/0x270 [ipv6]
inet6_init+0x180/0x330 [ipv6]
do_one_initcall+0x44/0x138
do_init_module+0x64/0x1d0
load_module+0x1230/0x1560
SyS_finit_module+0x120/0x130
el0_svc_naked+0x24/0x28
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