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Message-ID: <20150306055758.GA28187@wfg-t540p.sh.intel.com>
Date: Fri, 6 Mar 2015 13:57:58 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Vladimir Davydov <vdavydov@...allels.com>
Cc: fengguang.wu@...el.com, Tejun Heo <tj@...nel.org>,
LKP <lkp@...org>, cgroups@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [cgroup] WARNING: CPU: 0 PID: 0 at arch/x86/kernel/cpu/common.c:1439
warn_pre_alternatives()
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git revert-295458e67284f57d154ec8156a22797c0cfb044a-295458e67284f57d154ec8156a22797c0cfb044a
commit 295458e67284f57d154ec8156a22797c0cfb044a
Author: Vladimir Davydov <vdavydov@...allels.com>
AuthorDate: Thu Feb 19 17:34:46 2015 +0300
Commit: Tejun Heo <tj@...nel.org>
CommitDate: Mon Mar 2 12:11:01 2015 -0500
cgroup: call cgroup_subsys->bind on cgroup subsys initialization
Currently, we call cgroup_subsys->bind only on unmount, remount, and
when creating a new root on mount. Since the default hierarchy root is
created in cgroup_init, we will not call cgroup_subsys->bind if the
default hierarchy is freshly mounted. As a result, some controllers will
behave incorrectly (most notably, the "memory" controller will not
enable hierarchy support). Fix this by calling cgroup_subsys->bind right
after initializing a cgroup subsystem.
Signed-off-by: Vladimir Davydov <vdavydov@...allels.com>
Signed-off-by: Tejun Heo <tj@...nel.org>
+------------------------------------------------------------------+------------+------------+------------+
| | 283cb41f42 | 295458e672 | 65cf2c9599 |
+------------------------------------------------------------------+------------+------------+------------+
| boot_successes | 60 | 0 | 0 |
| boot_failures | 0 | 20 | 12 |
| WARNING:at_arch/x86/kernel/cpu/common.c:#warn_pre_alternatives() | 0 | 20 | 12 |
| BUG:unable_to_handle_kernel | 0 | 20 | 12 |
| Oops | 0 | 20 | 12 |
| RIP:cpumask_copy | 0 | 20 | 12 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 20 | 12 |
| backtrace:async_page_fault | 0 | 20 | 12 |
| backtrace:cgroup_init | 0 | 20 | 12 |
+------------------------------------------------------------------+------------+------------+------------+
[ 0.020009] Mountpoint-cache hash table entries: 1024 (order: 1, 8192 bytes)
[ 0.021989] ------------[ cut here ]------------
[ 0.021989] ------------[ cut here ]------------
[ 0.022816] WARNING: CPU: 0 PID: 0 at arch/x86/kernel/cpu/common.c:1439 warn_pre_alternatives+0x25/0x2e()
[ 0.022816] WARNING: CPU: 0 PID: 0 at arch/x86/kernel/cpu/common.c:1439 warn_pre_alternatives+0x25/0x2e()
[ 0.024000] You're using static_cpu_has before alternatives have run!
[ 0.024000] You're using static_cpu_has before alternatives have run!
[ 0.024000] Modules linked in:
[ 0.024000] Modules linked in:
[ 0.024000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.0.0-rc1-00004-g295458e #455
[ 0.024000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.0.0-rc1-00004-g295458e #455
[ 0.024000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 0.024000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 0.024000] 0000000000000009
[ 0.024000] 0000000000000009 ffffffff81e03cc8 ffffffff81e03cc8 ffffffff81674d02 ffffffff81674d02 ffffffff810ca88e ffffffff810ca88e
[ 0.024000] ffffffff81e03d18
[ 0.024000] ffffffff81e03d18 ffffffff81e03d08 ffffffff81e03d08 ffffffff81073d6f ffffffff81073d6f 0000000000000000 0000000000000000
[ 0.024000] ffffffff81018f79
[ 0.024000] ffffffff81018f79 ffffffff81e03e38 ffffffff81e03e38 0000000000000000 0000000000000000 0000000000000002 0000000000000002
[ 0.024000] Call Trace:
[ 0.024000] Call Trace:
[ 0.024000] [<ffffffff81674d02>] dump_stack+0xa0/0xd5
[ 0.024000] [<ffffffff81674d02>] dump_stack+0xa0/0xd5
[ 0.024000] [<ffffffff810ca88e>] ? console_unlock+0x496/0x4ef
[ 0.024000] [<ffffffff810ca88e>] ? console_unlock+0x496/0x4ef
[ 0.024000] [<ffffffff81073d6f>] warn_slowpath_common+0xc8/0xf7
[ 0.024000] [<ffffffff81073d6f>] warn_slowpath_common+0xc8/0xf7
[ 0.024000] [<ffffffff81018f79>] ? warn_pre_alternatives+0x25/0x2e
[ 0.024000] [<ffffffff81018f79>] ? warn_pre_alternatives+0x25/0x2e
[ 0.024000] [<ffffffff81073e6a>] warn_slowpath_fmt+0x4f/0x58
[ 0.024000] [<ffffffff81073e6a>] warn_slowpath_fmt+0x4f/0x58
[ 0.024000] [<ffffffff81680f47>] ? native_iret+0x7/0x7
[ 0.024000] [<ffffffff81680f47>] ? native_iret+0x7/0x7
[ 0.024000] [<ffffffff81018f79>] warn_pre_alternatives+0x25/0x2e
[ 0.024000] [<ffffffff81018f79>] warn_pre_alternatives+0x25/0x2e
[ 0.024000] [<ffffffff81039306>] __do_page_fault+0x2b4/0x7c2
[ 0.024000] [<ffffffff81039306>] __do_page_fault+0x2b4/0x7c2
[ 0.024000] [<ffffffff81039852>] do_page_fault+0x3e/0x4a
[ 0.024000] [<ffffffff81039852>] do_page_fault+0x3e/0x4a
[ 0.024000] [<ffffffff81034109>] do_async_page_fault+0x3a/0xb9
[ 0.024000] [<ffffffff81034109>] do_async_page_fault+0x3a/0xb9
[ 0.024000] [<ffffffff81681a28>] async_page_fault+0x28/0x30
[ 0.024000] [<ffffffff81681a28>] async_page_fault+0x28/0x30
[ 0.024000] [<ffffffff8110d870>] ? cpumask_copy+0x2c/0x2f
[ 0.024000] [<ffffffff8110d870>] ? cpumask_copy+0x2c/0x2f
[ 0.024000] [<ffffffff8110e174>] ? cpuset_bind+0x5b/0xc4
[ 0.024000] [<ffffffff8110e174>] ? cpuset_bind+0x5b/0xc4
[ 0.024000] [<ffffffff8234d780>] cgroup_init+0x2fa/0x3d3
[ 0.024000] [<ffffffff8234d780>] cgroup_init+0x2fa/0x3d3
[ 0.024000] [<ffffffff8232f5fe>] start_kernel+0x6ed/0x755
[ 0.024000] [<ffffffff8232f5fe>] start_kernel+0x6ed/0x755
[ 0.024000] [<ffffffff8232e120>] ? early_idt_handlers+0x120/0x120
[ 0.024000] [<ffffffff8232e120>] ? early_idt_handlers+0x120/0x120
[ 0.024000] [<ffffffff8232e585>] x86_64_start_reservations+0x46/0x4f
[ 0.024000] [<ffffffff8232e585>] x86_64_start_reservations+0x46/0x4f
[ 0.024000] [<ffffffff8232e73e>] x86_64_start_kernel+0x1b0/0x1c6
[ 0.024000] [<ffffffff8232e73e>] x86_64_start_kernel+0x1b0/0x1c6
[ 0.024000] ---[ end trace 37d9a871c47a31bc ]---
[ 0.024000] ---[ end trace 37d9a871c47a31bc ]---
git bisect start 65cf2c95998c3b0dc56fbc5a8d755516f46344c8 c517d838eb7d07bbe9507871fab3931deccff539 --
git bisect bad 5c5d421c7911237ed09ec2d9026bff2e6b8c72d7 # 02:55 0- 20 Merge 'cgroup/for-4.1' into devel-snb-smoke-201503030223
git bisect good a8665ef94d4af88f49bf4c6a069862bfdf516ddd # 03:19 20+ 0 Merge 'slave-dma/fixes' into devel-snb-smoke-201503030223
git bisect good 917a4e19e45993f1c8edf7150b24e1aab006a005 # 03:39 20+ 0 Merge 'slave-dma/for-linus' into devel-snb-smoke-201503030223
git bisect good 4666fafd7daeb18477d01a6692b78446060aaf92 # 03:45 20+ 0 Merge 'slave-dma/next' into devel-snb-smoke-201503030223
git bisect good 79063bffc81f82689bd90e16da1b49408f3bf095 # 03:55 20+ 0 cpuset: fix a warning when clearing configured masks in old hierarchy
git bisect bad 295458e67284f57d154ec8156a22797c0cfb044a # 04:12 0- 20 cgroup: call cgroup_subsys->bind on cgroup subsys initialization
git bisect good 283cb41f426b723a0255702b761b0fc5d1b53a81 # 04:27 20+ 0 cpuset: Fix cpuset sched_relax_domain_level
# first bad commit: [295458e67284f57d154ec8156a22797c0cfb044a] cgroup: call cgroup_subsys->bind on cgroup subsys initialization
git bisect good 283cb41f426b723a0255702b761b0fc5d1b53a81 # 04:32 60+ 0 cpuset: Fix cpuset sched_relax_domain_level
# extra tests with DEBUG_INFO
git bisect good 295458e67284f57d154ec8156a22797c0cfb044a # 04:49 60+ 0 cgroup: call cgroup_subsys->bind on cgroup subsys initialization
# extra tests on HEAD of linux-devel/devel-snb-smoke-201503030223
git bisect bad 65cf2c95998c3b0dc56fbc5a8d755516f46344c8 # 04:49 0- 12 0day head guard for 'devel-snb-smoke-201503030223'
# extra tests on tree/branch cgroup/for-next
git bisect bad 295458e67284f57d154ec8156a22797c0cfb044a # 04:51 0- 20 cgroup: call cgroup_subsys->bind on cgroup subsys initialization
# extra tests with first bad commit reverted
# extra tests on tree/branch linus/master
git bisect good a38ecbbd0be025a6ecbbfd22d2575a5b46317117 # 05:18 60+ 0 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
# extra tests on tree/branch next/master
git bisect good 8bcbe02ae769f1753eb19d57897d71c731d57772 # 05:20 60+ 0 Add linux-next specific files for 20150302
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
kvm=(
qemu-system-x86_64
-cpu kvm64
-enable-kvm
-kernel $kernel
-m 320
-smp 1
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
rd.udev.log-priority=err
systemd.log_target=journal
systemd.log_level=warning
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
Thanks,
Fengguang
View attachment "dmesg-yocto-client6-17:20150303041128:x86_64-randconfig-s0-03021957:4.0.0-rc1-00004-g295458e:455" of type "text/plain" (48133 bytes)
View attachment "config-4.0.0-rc1-00004-g295458e" of type "text/plain" (80039 bytes)
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