From: Sachin Sant <sachinp@in.ibm.com>
To: linux-kernel <linux-kernel@vger.kernel.org>
Cc: linuxppc-dev@ozlabs.org, menage@google.com,
Balbir Singh <balbir@linux.vnet.ibm.com>
Subject: [BUG] lib/kernel_lock.c:126 with cgroups regression ltp tests
Date: Wed, 17 Jun 2009 16:21:24 +0530 [thread overview]
Message-ID: <4A38CAAC.4090606@in.ibm.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 2356 bytes --]
While executing cgroups regression tests from LTP May 2009
release on a Power6 box came across the following bug.
This is with 2.6.30-git10 (300df7dc89cc276377fc020704e34875d5c473b6)
------------[ cut here ]------------
kernel BUG at lib/kernel_lock.c:126!
Oops: Exception in kernel mode, sig: 5 [#1]
SMP NR_CPUS=1024 NUMA pSeries
Modules linked in: ipv6 fuse loop dm_mod sr_mod ehea cdrom sg ibmveth sd_mod crc_t10dif ibmvscsic scsi_transport_srp scsi_tgt scsi_mod
NIP: c0000000005c6dac LR: c0000000001965ac CTR: 0000000000000006
REGS: c00000002a5d3910 TRAP: 0700 Not tainted (2.6.30-git10)
MSR: 8000000000029032 <EE,ME,CE,IR,DR> CR: 82042442 XER: 00000000
TASK = c0000000407cbc20[9581] 'mount' THREAD: c00000002a5d0000 CPU: 3
<6>GPR00: 0000000000000001 c00000002a5d3b90 c000000000ef31f0 fffffffffffffff0
<6>GPR04: c0000000000f0098 c000000000799813 0000000000000000 0000000000000001
<6>GPR08: c000000000e36aa0 c0000000407cbc20 0000000000000002 c0000000407cbc20
<6>GPR12: 0000000024042424 c000000000ff2a00 00000fffed50f6fd 00000fffed506e08
<6>GPR16: 00000fffed506db8 000000001002b638 0000000000000000 0000000000000000
<6>GPR20: 00000000100329a0 00000fffed506e0c c00000003e14b870 0000000000000000
<6>GPR24: 0000000000000000 c00000002a030000 0000000000000000 0000000000000000
<6>GPR28: c00000003e14b800 fffffffffffffff0 c000000000e7aa40 c00000002a5d3b90
NIP [c0000000005c6dac] .unlock_kernel+0x20/0x78
LR [c0000000001965ac] .do_remount_sb+0x190/0x204
Call Trace:
[c00000002a5d3bd0] [c00000000019659c] .do_remount_sb+0x180/0x204
[c00000002a5d3c70] [c0000000001b8210] .do_mount+0x38c/0x9fc
[c00000002a5d3d60] [c0000000001b8940] .SyS_mount+0xc0/0x12c
[c00000002a5d3e30] [c000000000008534] syscall_exit+0x0/0x40
Instruction dump:
383f0040 ebc1fff0 ebe1fff8 4e800020 fbc1fff0 fbe1fff8 f821ffc1 7c3f0b78
ebc2c0b8 e92d01b0 e809001e 78000fe0 <0b000000> e96d01b0 812b001c 3929ffff
---[ end trace 3bf0012ad33d52b2 ]---
Corresponding c code is :
void __lockfunc unlock_kernel(void)
{
BUG_ON(current->lock_depth < 0); <<======
if (likely(--current->lock_depth < 0))
__unlock_kernel();
Have attached the cgroups regression test run log.
Thanks
-Sachin
--
---------------------------------
Sachin Sant
IBM Linux Technology Center
India Systems and Technology Labs
Bangalore, India
---------------------------------
[-- Attachment #2: controller-run.log --]
[-- Type: text/x-log, Size: 2832 bytes --]
cgroup_regression_test 1 PASS : no kernel bug was found
/ltp-full-20090531/testcases/bin/cgroup_regression_test.sh: line 102: 7036 Terminated ./fork_processes
cgroup_regression_test 2 PASS : notify_on_release is inherited
cgroup_regression_test 3 PASS : no kernel bug was found
cgroup_regression_test 4 CONF : CONFIG_LOCKDEP is not enabled
cgroup_regression_test 5 PASS : no kernel bug was found
/ltp-full-20090531/testcases/bin/cgroup_regression_test.sh: line 253: 8781 Terminated sleep 100
/ltp-full-20090531/testcases/bin/cgroup_regression_test.sh: line 325: 8800 Terminated ./test_6_2
cgroup_regression_test 6 PASS : no kernel bug was found
------------[ cut here ]------------
Oops: Exception in kernel mode, sig: 5 [#1]
SMP NR_CPUS=1024 NUMA pSeries
Modules linked in: ipv6 fuse loop dm_mod sr_mod ehea cdrom sg ibmveth sd_mod crc_t10dif ibmvscsic scsi_transport_srp scsi_tgt scsi_mod
NIP: c0000000005c6dac LR: c0000000001965ac CTR: 0000000000000006
REGS: c00000002a5d3910 TRAP: 0700 Not tainted (2.6.30-git10)
MSR: 8000000000029032 <EE,ME,CE,IR,DR> CR: 82042442 XER: 00000000
TASK = c0000000407cbc20[9581] 'mount' THREAD: c00000002a5d0000 CPU: 3
<6>GPR00: 0000000000000001 c00000002a5d3b90 c000000000ef31f0 fffffffffffffff0
<6>GPR04: c0000000000f0098 c000000000799813 0000000000000000 0000000000000001
<6>GPR08: c000000000e36aa0 c0000000407cbc20 0000000000000002 c0000000407cbc20
<6>GPR12: 0000000024042424 c000000000ff2a00 00000fffed50f6fd 00000fffed506e08
<6>GPR16: 00000fffed506db8 000000001002b638 0000000000000000 0000000000000000
<6>GPR20: 00000000100329a0 00000fffed506e0c c00000003e14b870 0000000000000000
<6>GPR24: 0000000000000000 c00000002a030000 0000000000000000 0000000000000000
<6>GPR28: c00000003e14b800 fffffffffffffff0 c000000000e7aa40 c00000002a5d3b90
NIP [c0000000005c6dac] .unlock_kernel+0x20/0x78
LR [c0000000001965ac] .do_remount_sb+0x190/0x204
Call Trace:
[c00000002a5d3bd0] [c00000000019659c] .do_remount_sb+0x180/0x204
[c00000002a5d3c70] [c0000000001b8210] .do_mount+0x38c/0x9fc
[c00000002a5d3d60] [c0000000001b8940] .SyS_mount+0xc0/0x12c
[c00000002a5d3e30] [c000000000008534] syscall_exit+0x0/0x40
Instruction dump:
383f0040 ebc1fff0 ebe1fff8 4e800020 fbc1fff0 fbe1fff8 f821ffc1 7c3f0b78
ebc2c0b8 e92d01b0 e809001e 78000fe0 <0b000000> e96d01b0 812b001c 3929ffff
---[ end trace 3bf0012ad33d52b2 ]---
/ltp-full-20090531/testcases/bin/cgroup_regression_test.sh: line 347: 9581 Trace/breakpoint trap mount -t cgroup -o remount xxx cgroup/ 2> /dev/null
/ltp-full-20090531/testcases/bin/cgroup_regression_test.sh: line 363: 9579 Terminated sleep 100 < cgroup/0
Cannot create link /etc/mtab~
Perhaps there is a stale lock file?
Cannot create link /etc/mtab~
Perhaps there is a stale lock file?
WARNING: multiple messages have this Message-ID (diff)
From: Sachin Sant <sachinp@in.ibm.com>
To: linux-kernel <linux-kernel@vger.kernel.org>
Cc: linuxppc-dev@ozlabs.org, Balbir Singh <balbir@linux.vnet.ibm.com>,
menage@google.com
Subject: [BUG] lib/kernel_lock.c:126 with cgroups regression ltp tests
Date: Wed, 17 Jun 2009 16:21:24 +0530 [thread overview]
Message-ID: <4A38CAAC.4090606@in.ibm.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 2356 bytes --]
While executing cgroups regression tests from LTP May 2009
release on a Power6 box came across the following bug.
This is with 2.6.30-git10 (300df7dc89cc276377fc020704e34875d5c473b6)
------------[ cut here ]------------
kernel BUG at lib/kernel_lock.c:126!
Oops: Exception in kernel mode, sig: 5 [#1]
SMP NR_CPUS=1024 NUMA pSeries
Modules linked in: ipv6 fuse loop dm_mod sr_mod ehea cdrom sg ibmveth sd_mod crc_t10dif ibmvscsic scsi_transport_srp scsi_tgt scsi_mod
NIP: c0000000005c6dac LR: c0000000001965ac CTR: 0000000000000006
REGS: c00000002a5d3910 TRAP: 0700 Not tainted (2.6.30-git10)
MSR: 8000000000029032 <EE,ME,CE,IR,DR> CR: 82042442 XER: 00000000
TASK = c0000000407cbc20[9581] 'mount' THREAD: c00000002a5d0000 CPU: 3
<6>GPR00: 0000000000000001 c00000002a5d3b90 c000000000ef31f0 fffffffffffffff0
<6>GPR04: c0000000000f0098 c000000000799813 0000000000000000 0000000000000001
<6>GPR08: c000000000e36aa0 c0000000407cbc20 0000000000000002 c0000000407cbc20
<6>GPR12: 0000000024042424 c000000000ff2a00 00000fffed50f6fd 00000fffed506e08
<6>GPR16: 00000fffed506db8 000000001002b638 0000000000000000 0000000000000000
<6>GPR20: 00000000100329a0 00000fffed506e0c c00000003e14b870 0000000000000000
<6>GPR24: 0000000000000000 c00000002a030000 0000000000000000 0000000000000000
<6>GPR28: c00000003e14b800 fffffffffffffff0 c000000000e7aa40 c00000002a5d3b90
NIP [c0000000005c6dac] .unlock_kernel+0x20/0x78
LR [c0000000001965ac] .do_remount_sb+0x190/0x204
Call Trace:
[c00000002a5d3bd0] [c00000000019659c] .do_remount_sb+0x180/0x204
[c00000002a5d3c70] [c0000000001b8210] .do_mount+0x38c/0x9fc
[c00000002a5d3d60] [c0000000001b8940] .SyS_mount+0xc0/0x12c
[c00000002a5d3e30] [c000000000008534] syscall_exit+0x0/0x40
Instruction dump:
383f0040 ebc1fff0 ebe1fff8 4e800020 fbc1fff0 fbe1fff8 f821ffc1 7c3f0b78
ebc2c0b8 e92d01b0 e809001e 78000fe0 <0b000000> e96d01b0 812b001c 3929ffff
---[ end trace 3bf0012ad33d52b2 ]---
Corresponding c code is :
void __lockfunc unlock_kernel(void)
{
BUG_ON(current->lock_depth < 0); <<======
if (likely(--current->lock_depth < 0))
__unlock_kernel();
Have attached the cgroups regression test run log.
Thanks
-Sachin
--
---------------------------------
Sachin Sant
IBM Linux Technology Center
India Systems and Technology Labs
Bangalore, India
---------------------------------
[-- Attachment #2: controller-run.log --]
[-- Type: text/x-log, Size: 2832 bytes --]
cgroup_regression_test 1 PASS : no kernel bug was found
/ltp-full-20090531/testcases/bin/cgroup_regression_test.sh: line 102: 7036 Terminated ./fork_processes
cgroup_regression_test 2 PASS : notify_on_release is inherited
cgroup_regression_test 3 PASS : no kernel bug was found
cgroup_regression_test 4 CONF : CONFIG_LOCKDEP is not enabled
cgroup_regression_test 5 PASS : no kernel bug was found
/ltp-full-20090531/testcases/bin/cgroup_regression_test.sh: line 253: 8781 Terminated sleep 100
/ltp-full-20090531/testcases/bin/cgroup_regression_test.sh: line 325: 8800 Terminated ./test_6_2
cgroup_regression_test 6 PASS : no kernel bug was found
------------[ cut here ]------------
Oops: Exception in kernel mode, sig: 5 [#1]
SMP NR_CPUS=1024 NUMA pSeries
Modules linked in: ipv6 fuse loop dm_mod sr_mod ehea cdrom sg ibmveth sd_mod crc_t10dif ibmvscsic scsi_transport_srp scsi_tgt scsi_mod
NIP: c0000000005c6dac LR: c0000000001965ac CTR: 0000000000000006
REGS: c00000002a5d3910 TRAP: 0700 Not tainted (2.6.30-git10)
MSR: 8000000000029032 <EE,ME,CE,IR,DR> CR: 82042442 XER: 00000000
TASK = c0000000407cbc20[9581] 'mount' THREAD: c00000002a5d0000 CPU: 3
<6>GPR00: 0000000000000001 c00000002a5d3b90 c000000000ef31f0 fffffffffffffff0
<6>GPR04: c0000000000f0098 c000000000799813 0000000000000000 0000000000000001
<6>GPR08: c000000000e36aa0 c0000000407cbc20 0000000000000002 c0000000407cbc20
<6>GPR12: 0000000024042424 c000000000ff2a00 00000fffed50f6fd 00000fffed506e08
<6>GPR16: 00000fffed506db8 000000001002b638 0000000000000000 0000000000000000
<6>GPR20: 00000000100329a0 00000fffed506e0c c00000003e14b870 0000000000000000
<6>GPR24: 0000000000000000 c00000002a030000 0000000000000000 0000000000000000
<6>GPR28: c00000003e14b800 fffffffffffffff0 c000000000e7aa40 c00000002a5d3b90
NIP [c0000000005c6dac] .unlock_kernel+0x20/0x78
LR [c0000000001965ac] .do_remount_sb+0x190/0x204
Call Trace:
[c00000002a5d3bd0] [c00000000019659c] .do_remount_sb+0x180/0x204
[c00000002a5d3c70] [c0000000001b8210] .do_mount+0x38c/0x9fc
[c00000002a5d3d60] [c0000000001b8940] .SyS_mount+0xc0/0x12c
[c00000002a5d3e30] [c000000000008534] syscall_exit+0x0/0x40
Instruction dump:
383f0040 ebc1fff0 ebe1fff8 4e800020 fbc1fff0 fbe1fff8 f821ffc1 7c3f0b78
ebc2c0b8 e92d01b0 e809001e 78000fe0 <0b000000> e96d01b0 812b001c 3929ffff
---[ end trace 3bf0012ad33d52b2 ]---
/ltp-full-20090531/testcases/bin/cgroup_regression_test.sh: line 347: 9581 Trace/breakpoint trap mount -t cgroup -o remount xxx cgroup/ 2> /dev/null
/ltp-full-20090531/testcases/bin/cgroup_regression_test.sh: line 363: 9579 Terminated sleep 100 < cgroup/0
Cannot create link /etc/mtab~
Perhaps there is a stale lock file?
Cannot create link /etc/mtab~
Perhaps there is a stale lock file?
next reply other threads:[~2009-06-17 10:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-17 10:51 Sachin Sant [this message]
2009-06-17 10:51 ` [BUG] lib/kernel_lock.c:126 with cgroups regression ltp tests Sachin Sant
2009-06-17 11:20 ` Michael Ellerman
2009-06-17 11:20 ` Michael Ellerman
2009-06-17 12:16 ` Sachin Sant
2009-06-17 12:16 ` Sachin Sant
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