diff mbox series

[linux-next:master,rcutorture] 7a1fcbb52e: WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_stats_print[rcutorture]

Message ID 202406241652.e44865a0-lkp@intel.com (mailing list archive)
State New
Headers show
Series [linux-next:master,rcutorture] 7a1fcbb52e: WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_stats_print[rcutorture] | expand

Commit Message

kernel test robot June 24, 2024, 8:44 a.m. UTC 
Hello,

the config for this test is a randconfig. by this commit, the config has below


we don't have enough knowledge how this diff impacts rcutorture test results,
just FYI what we observed in our tests.


kernel test robot noticed "WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_stats_print[rcutorture]" on:

commit: 7a1fcbb52e611c49331bd66dd2da1efa4c0afef7 ("rcutorture: Add SRCU-V scenario for preemptible Tiny SRCU")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

[test failed on linux-next/master f76698bd9a8ca01d3581236082d786e9a6b72bb7]

in testcase: rcutorture
version: 
with following parameters:

	runtime: 300s
	test: default
	torture_type: busted_srcud



compiler: gcc-13
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

(please refer to attached dmesg/kmsg for entire log/backtrace)


+-------------------------------------------------------------------------+------------+------------+
|                                                                         | d65635ebba | 7a1fcbb52e |
+-------------------------------------------------------------------------+------------+------------+
| WARNING:suspicious_RCU_usage                                            | 6          | 6          |
| kernel/rcu/rcutorture.c:#suspicious_rcu_dereference_check()usage        | 6          | 6          |
| WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_stats_print[rcutorture] | 0          | 6          |
| EIP:rcu_torture_stats_print                                             | 0          | 6          |
+-------------------------------------------------------------------------+------------+------------+


If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202406241652.e44865a0-lkp@intel.com



The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240624/202406241652.e44865a0-lkp@intel.com


[   96.952168][  T436] busted_srcud-torture: !!! 
[   96.952253][  T436] ------------[ cut here ]------------
[   96.954867][  T436] WARNING: CPU: 0 PID: 436 at kernel/rcu/rcutorture.c:2268 rcu_torture_stats_print+0x253/0x496 [rcutorture]
[   96.956537][  T436] Modules linked in: rcutorture torture ppdev i6300esb rapl ipmi_devintf parport_pc bochs drm_vram_helper parport drm_ttm_helper ttm drm_kms_helper i2c_piix4 tiny_power_button ata_generic button fuse drm drm_panel_orientation_quirks i2c_core configfs
[   96.959483][  T436] CPU: 0 PID: 436 Comm: rcu_torture_sta Not tainted 6.10.0-rc1-00067-g7a1fcbb52e61 #1
[   96.960380][  T436] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[   96.961355][  T436] EIP: rcu_torture_stats_print+0x253/0x496 [rcutorture]
[   96.962139][  T436] Code: 85 c0 74 02 0f 0b 83 3d e4 17 59 ef 00 74 02 0f 0b 83 3d e0 17 59 ef 00 74 02 0f 0b 83 3d dc 17 59 ef 00 74 02 0f 0b 4b 7e 02 <0f> 0b 68 31 76 59 ef 31 db e8 40 11 54 de 5f 83 fb 0b 72 0c 89 da
[   96.963988][  T436] EAX: 00000000 EBX: 00000003 ECX: ef597627 EDX: ef59762c
[   96.964651][  T436] ESI: ef591994 EDI: 0000453c EBP: c6567f6c ESP: c6567eec
[   96.965187][  T436] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010206
[   96.965660][  T436] CR0: 80050033 CR2: b6b5f000 CR3: 04f71000 CR4: 00040690
[   96.966172][  T436] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[   96.966624][  T436] DR6: fffe0ff0 DR7: 00000400
[   96.966924][  T436] Call Trace:
[   96.967138][  T436]  ? show_regs+0x45/0x4b
[   96.967415][  T436]  ? rcu_torture_stats_print+0x253/0x496 [rcutorture]
[   96.967849][  T436]  ? __warn+0x7c/0x113
[   96.968117][  T436]  ? report_bug+0xb3/0x111
[   96.968406][  T436]  ? rcu_torture_stats_print+0x253/0x496 [rcutorture]
[   96.968880][  T436]  ? exc_overflow+0x37/0x37
[   96.969174][  T436]  ? handle_bug+0x2b/0x47
[   96.969452][  T436]  ? exc_invalid_op+0x17/0x53
[   96.969755][  T436]  ? handle_exception+0x100/0x100
[   96.970141][  T436]  ? exc_overflow+0x37/0x37
[   96.970434][  T436]  ? rcu_torture_stats_print+0x253/0x496 [rcutorture]
[   96.970871][  T436]  ? exc_overflow+0x37/0x37
[   96.971162][  T436]  ? rcu_torture_stats_print+0x253/0x496 [rcutorture]
[   96.971599][  T436]  ? __timer_delete_sync+0x82/0x92
[   96.971938][  T436]  rcu_torture_stats+0x3d/0x5e [rcutorture]
[   96.972322][  T436]  kthread+0xdc/0xe1
[   96.972575][  T436]  ? rcu_torture_stats_print+0x496/0x496 [rcutorture]
[   96.973010][  T436]  ? kthread_park+0x62/0x62
[   96.973302][  T436]  ret_from_fork+0x1c/0x2f
[   96.973589][  T436]  ? kthread_park+0x62/0x62
[   96.973879][  T436]  ret_from_fork_asm+0x12/0x18
[   96.974230][  T436]  entry_INT80_32+0xef/0xef
[   96.974519][  T436] irq event stamp: 535
[   96.974777][  T436] hardirqs last  enabled at (543): [<cda8b4e9>] console_unlock+0x80/0xd4
[   96.975183][  T436] hardirqs last disabled at (550): [<cda8b4cc>] console_unlock+0x63/0xd4
[   96.975588][  T436] softirqs last  enabled at (104): [<cda4d6de>] handle_softirqs+0x2cf/0x2f9
[   96.976007][  T436] softirqs last disabled at (97): [<ce313fce>] __do_softirq+0xa/0xc
[   96.976392][  T436] ---[ end trace 0000000000000000 ]---
[   96.999461][  T436] Reader Pipe:  1738294 6779 1992 57 1 0 0 0 0 0 0
[   96.999803][  T436] busted_srcud-torture: Reader Batch:  1747123 0 0 0 0 0 0 0 0 0 0

Comments

Paul E. McKenney June 24, 2024, 12:54 p.m. UTC | #1 
On Mon, Jun 24, 2024 at 04:44:01PM +0800, kernel test robot wrote:
> 
> 
> Hello,
> 
> the config for this test is a randconfig. by this commit, the config has below
> diff between parent and this commit.
> 
> --- /pkg/linux/i386-randconfig-r022-20221003/gcc-13/d65635ebba92ee02e8284acfabbaf6b59ec0b5b6/.config    2024-06-23 23:24:45.203220229 +0800
> +++ /pkg/linux/i386-randconfig-r022-20221003/gcc-13/7a1fcbb52e611c49331bd66dd2da1efa4c0afef7/.config    2024-06-23 23:59:34.976722738 +0800
> @@ -133,7 +133,7 @@ CONFIG_IRQ_TIME_ACCOUNTING=y
>  CONFIG_TREE_RCU=y
>  CONFIG_PREEMPT_RCU=y
>  CONFIG_RCU_EXPERT=y
> -CONFIG_TREE_SRCU=y
> +CONFIG_TINY_SRCU=y
>  CONFIG_TASKS_RCU_GENERIC=y
>  CONFIG_FORCE_TASKS_RCU=y
>  CONFIG_NEED_TASKS_RCU=y
> 
> 
> we don't have enough knowledge how this diff impacts rcutorture test results,
> just FYI what we observed in our tests.
> 
> 
> kernel test robot noticed "WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_stats_print[rcutorture]" on:
> 
> commit: 7a1fcbb52e611c49331bd66dd2da1efa4c0afef7 ("rcutorture: Add SRCU-V scenario for preemptible Tiny SRCU")
> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
> 
> [test failed on linux-next/master f76698bd9a8ca01d3581236082d786e9a6b72bb7]
> 
> in testcase: rcutorture
> version: 
> with following parameters:
> 
> 	runtime: 300s
> 	test: default
> 	torture_type: busted_srcud
> 
> 
> 
> compiler: gcc-13
> test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
> 
> (please refer to attached dmesg/kmsg for entire log/backtrace)
> 
> 
> +-------------------------------------------------------------------------+------------+------------+
> |                                                                         | d65635ebba | 7a1fcbb52e |
> +-------------------------------------------------------------------------+------------+------------+
> | WARNING:suspicious_RCU_usage                                            | 6          | 6          |
> | kernel/rcu/rcutorture.c:#suspicious_rcu_dereference_check()usage        | 6          | 6          |
> | WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_stats_print[rcutorture] | 0          | 6          |
> | EIP:rcu_torture_stats_print                                             | 0          | 6          |
> +-------------------------------------------------------------------------+------------+------------+
> 
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <oliver.sang@intel.com>
> | Closes: https://lore.kernel.org/oe-lkp/202406241652.e44865a0-lkp@intel.com
> 
> 
> 
> The kernel config and materials to reproduce are available at:
> https://download.01.org/0day-ci/archive/20240624/202406241652.e44865a0-lkp@intel.com
> 
> 
> [   96.952168][  T436] busted_srcud-torture: !!! 

The "busted" in "busted_srcud" indicates that failure is expected.
So any torture_type containing "busted" is a test of rcutorture's ability
to find bugs.

							Thanx, Paul

> [   96.952253][  T436] ------------[ cut here ]------------
> [   96.954867][  T436] WARNING: CPU: 0 PID: 436 at kernel/rcu/rcutorture.c:2268 rcu_torture_stats_print+0x253/0x496 [rcutorture]
> [   96.956537][  T436] Modules linked in: rcutorture torture ppdev i6300esb rapl ipmi_devintf parport_pc bochs drm_vram_helper parport drm_ttm_helper ttm drm_kms_helper i2c_piix4 tiny_power_button ata_generic button fuse drm drm_panel_orientation_quirks i2c_core configfs
> [   96.959483][  T436] CPU: 0 PID: 436 Comm: rcu_torture_sta Not tainted 6.10.0-rc1-00067-g7a1fcbb52e61 #1
> [   96.960380][  T436] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
> [   96.961355][  T436] EIP: rcu_torture_stats_print+0x253/0x496 [rcutorture]
> [   96.962139][  T436] Code: 85 c0 74 02 0f 0b 83 3d e4 17 59 ef 00 74 02 0f 0b 83 3d e0 17 59 ef 00 74 02 0f 0b 83 3d dc 17 59 ef 00 74 02 0f 0b 4b 7e 02 <0f> 0b 68 31 76 59 ef 31 db e8 40 11 54 de 5f 83 fb 0b 72 0c 89 da
> [   96.963988][  T436] EAX: 00000000 EBX: 00000003 ECX: ef597627 EDX: ef59762c
> [   96.964651][  T436] ESI: ef591994 EDI: 0000453c EBP: c6567f6c ESP: c6567eec
> [   96.965187][  T436] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010206
> [   96.965660][  T436] CR0: 80050033 CR2: b6b5f000 CR3: 04f71000 CR4: 00040690
> [   96.966172][  T436] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
> [   96.966624][  T436] DR6: fffe0ff0 DR7: 00000400
> [   96.966924][  T436] Call Trace:
> [   96.967138][  T436]  ? show_regs+0x45/0x4b
> [   96.967415][  T436]  ? rcu_torture_stats_print+0x253/0x496 [rcutorture]
> [   96.967849][  T436]  ? __warn+0x7c/0x113
> [   96.968117][  T436]  ? report_bug+0xb3/0x111
> [   96.968406][  T436]  ? rcu_torture_stats_print+0x253/0x496 [rcutorture]
> [   96.968880][  T436]  ? exc_overflow+0x37/0x37
> [   96.969174][  T436]  ? handle_bug+0x2b/0x47
> [   96.969452][  T436]  ? exc_invalid_op+0x17/0x53
> [   96.969755][  T436]  ? handle_exception+0x100/0x100
> [   96.970141][  T436]  ? exc_overflow+0x37/0x37
> [   96.970434][  T436]  ? rcu_torture_stats_print+0x253/0x496 [rcutorture]
> [   96.970871][  T436]  ? exc_overflow+0x37/0x37
> [   96.971162][  T436]  ? rcu_torture_stats_print+0x253/0x496 [rcutorture]
> [   96.971599][  T436]  ? __timer_delete_sync+0x82/0x92
> [   96.971938][  T436]  rcu_torture_stats+0x3d/0x5e [rcutorture]
> [   96.972322][  T436]  kthread+0xdc/0xe1
> [   96.972575][  T436]  ? rcu_torture_stats_print+0x496/0x496 [rcutorture]
> [   96.973010][  T436]  ? kthread_park+0x62/0x62
> [   96.973302][  T436]  ret_from_fork+0x1c/0x2f
> [   96.973589][  T436]  ? kthread_park+0x62/0x62
> [   96.973879][  T436]  ret_from_fork_asm+0x12/0x18
> [   96.974230][  T436]  entry_INT80_32+0xef/0xef
> [   96.974519][  T436] irq event stamp: 535
> [   96.974777][  T436] hardirqs last  enabled at (543): [<cda8b4e9>] console_unlock+0x80/0xd4
> [   96.975183][  T436] hardirqs last disabled at (550): [<cda8b4cc>] console_unlock+0x63/0xd4
> [   96.975588][  T436] softirqs last  enabled at (104): [<cda4d6de>] handle_softirqs+0x2cf/0x2f9
> [   96.976007][  T436] softirqs last disabled at (97): [<ce313fce>] __do_softirq+0xa/0xc
> [   96.976392][  T436] ---[ end trace 0000000000000000 ]---
> [   96.999461][  T436] Reader Pipe:  1738294 6779 1992 57 1 0 0 0 0 0 0
> [   96.999803][  T436] busted_srcud-torture: Reader Batch:  1747123 0 0 0 0 0 0 0 0 0 0
> 
> 
> 
> -- 
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
>
diff mbox series

Patch

diff between parent and this commit.

--- /pkg/linux/i386-randconfig-r022-20221003/gcc-13/d65635ebba92ee02e8284acfabbaf6b59ec0b5b6/.config    2024-06-23 23:24:45.203220229 +0800
+++ /pkg/linux/i386-randconfig-r022-20221003/gcc-13/7a1fcbb52e611c49331bd66dd2da1efa4c0afef7/.config    2024-06-23 23:59:34.976722738 +0800
@@ -133,7 +133,7 @@  CONFIG_IRQ_TIME_ACCOUNTING=y
 CONFIG_TREE_RCU=y
 CONFIG_PREEMPT_RCU=y
 CONFIG_RCU_EXPERT=y
-CONFIG_TREE_SRCU=y
+CONFIG_TINY_SRCU=y
 CONFIG_TASKS_RCU_GENERIC=y
 CONFIG_FORCE_TASKS_RCU=y
 CONFIG_NEED_TASKS_RCU=y