hi, Ankur Arora and all,
this is not a regression report as our bot normally does. this report is just
FYI that we observe a WARNING with this config, in case it could supply any
useful information and/or somebody wants to have a look.
by this change, the config has below diff with parent:
==================== PARENT FIRST_BAD KCONFIGS
f001b7165def8f7af6ce95d08f0e1bbc2442654d ====================
---
/pkg/linux/i386-randconfig-r121-20250212/gcc-12/f001b7165def8f7af6ce95d08f0e1bbc2442654d/.config
2025-02-13 07:56:33.420457682 +0800
+++
/pkg/linux/i386-randconfig-r121-20250212/gcc-12/c9b55f9da0d2c72c8c8d8cd5df84af5251b74283/.config
2025-02-13 08:43:08.186415593 +0800
@@ -147,7 +147,6 @@ CONFIG_BSD_PROCESS_ACCT=y
# RCU Subsystem
#
CONFIG_TREE_RCU=y
-CONFIG_PREEMPT_RCU=y
CONFIG_RCU_EXPERT=y
CONFIG_TREE_SRCU=y
CONFIG_TASKS_RCU_GENERIC=y
@@ -162,7 +161,6 @@ CONFIG_RCU_STALL_COMMON=y
CONFIG_RCU_NEED_SEGCBLIST=y
CONFIG_RCU_FANOUT=32
CONFIG_RCU_FANOUT_LEAF=16
-# CONFIG_RCU_BOOST is not set
# CONFIG_RCU_NOCB_CPU is not set
# CONFIG_TASKS_TRACE_RCU_READ_MB is not set
# CONFIG_RCU_DOUBLE_CHECK_CB_TIME is not set
below is full report.
Hello,
kernel test robot noticed
"WARNING:at_kernel/rcu/rcutorture.c:#rcutorture_one_extend_check[rcutorture]"
on:
commit: c9b55f9da0d2c72c8c8d8cd5df84af5251b74283 ("rcu: limit PREEMPT_RCU
configurations")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
[test failed on linux-next/master c674aa7c289e51659e40dda0f954886ef7f80042]
in testcase: rcutorture
version:
with following parameters:
runtime: 300s
test: cpuhotplug
torture_type: rcu
config: i386-randconfig-r121-20250212
compiler: gcc-12
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+-----------------------------------------------------------------------------+------------+------------+
| |
f001b7165d | c9b55f9da0 |
+-----------------------------------------------------------------------------+------------+------------+
| WARNING:at_kernel/rcu/rcutorture.c:#rcutorture_one_extend_check[rcutorture] |
0 | 12 |
| EIP:rcutorture_one_extend_check |
0 | 12 |
+-----------------------------------------------------------------------------+------------+------------+
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 <[email protected]>
| Closes: https://lore.kernel.org/oe-lkp/[email protected]
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250217/[email protected]
[ 109.553253][ T781] rcu-torture: rcu_torture_reader task started
[ 109.553258][ T781] ------------[ cut here ]------------
[ 109.553259][ T781] rcutorture_one_extend_check during change: Current 0x4
To add 0x4 To remove 0x0 preempt_count() 0x1
[ 109.553292][ T781] WARNING: CPU: 1 PID: 781 at kernel/rcu/rcutorture.c:1905
rcutorture_one_extend_check+0x25a/0x267 [rcutorture]
[ 109.553302][ T781] Modules linked in: rcutorture(+) torture
[ 109.553307][ T781] CPU: 1 UID: 0 PID: 781 Comm: rcu_torture_rea Tainted: G
T 6.14.0-rc1-00007-gc9b55f9da0d2 #1
[ 109.553310][ T781] Tainted: [T]=RANDSTRUCT
[ 109.553311][ T781] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 109.553312][ T781] EIP: rcutorture_one_extend_check+0x25a/0x267 [rcutorture]
[ 109.553318][ T781] Code: 75 2d c6 05 fd 04 1c f1 01 64 a1 84 77 7c 97 25 ff
ff ff 7f 50 ff 75 08 57 53 56 68 60 9f 1c f1 68 a4 74 1c f1 e8 8d d3 ca a3 <0f>
0b 83 c4 1c 8d 65 f4 5b 5e 5f 5d c3 55 31 d2 83 f8 1f 89 e5 53
[ 109.553320][ T781] EAX: 00000066 EBX: 00000004 ECX: 00000027 EDX: e89c1a00
[ 109.553322][ T781] ESI: f11c92d9 EDI: 00000004 EBP: 825d1d88 ESP: 825d1d54
[ 109.553323][ T781] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS:
00010282
[ 109.553327][ T781] CR0: 80050033 CR2: 77235000 CR3: 010c5000 CR4: 00040690
[ 109.553328][ T781] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 109.553330][ T781] DR6: fffe0ff0 DR7: 00000400
[ 109.553331][ T781] Call Trace:
[ 109.553333][ T781] ? show_regs+0x4c/0x52
[ 109.553343][ T781] ? rcutorture_one_extend_check+0x25a/0x267 [rcutorture]
[ 109.553349][ T781] ? __warn+0x9e/0x15f
[ 109.553354][ T781] ? report_bug+0xe8/0x14a
[ 109.553357][ T781] ? rcutorture_one_extend_check+0x25a/0x267 [rcutorture]
[ 109.553364][ T781] ? exc_overflow+0x37/0x37
[ 109.553367][ T781] ? handle_bug+0x3a/0x55
[ 109.553369][ T781] ? exc_invalid_op+0x1a/0x56
[ 109.553372][ T781] ? handle_exception+0x148/0x148
[ 109.553376][ T781] ? osq_wait_next+0x18/0x41
[ 109.553379][ T781] ? exc_overflow+0x37/0x37
[ 109.553381][ T781] ? rcutorture_one_extend_check+0x25a/0x267 [rcutorture]
[ 109.553388][ T781] ? exc_overflow+0x37/0x37
[ 109.553390][ T781] ? rcutorture_one_extend_check+0x25a/0x267 [rcutorture]
[ 109.553399][ T781] rcutorture_one_extend+0x18c/0x3c1 [rcutorture]
[ 109.553410][ T781] rcu_torture_one_read+0x95/0x4d2 [rcutorture]
[ 109.553417][ T781] ? validate_chain+0x3d/0x24c
[ 109.553420][ T781] ? mark_lock+0x6a/0x14d
[ 109.553440][ T781] rcu_torture_reader+0xc4/0xdbd [rcutorture]
[ 109.553448][ T781] ? rcu_torture_one_read+0x4d2/0x4d2 [rcutorture]
[ 109.553457][ T781] kthread+0x169/0x16e
[ 109.553459][ T781] ? rcu_torture_read_exit_child+0x3a/0x3a [rcutorture]
[ 109.553466][ T781] ? kthread_is_per_cpu+0x17/0x17
[ 109.553468][ T781] ret_from_fork+0x19/0x2c
[ 109.553471][ T781] ? kthread_is_per_cpu+0x17/0x17
[ 109.553472][ T781] ret_from_fork_asm+0x12/0x20
[ 109.553475][ T781] entry_INT80_32+0x108/0x108
[ 109.553481][ T781] irq event stamp: 307
[ 109.553482][ T781] hardirqs last enabled at (313): [<94ebb6cb>]
console_trylock_spinning+0x6b/0x10a
[ 109.553485][ T781] hardirqs last disabled at (318): [<94ebb691>]
console_trylock_spinning+0x31/0x10a
[ 109.553486][ T781] softirqs last enabled at (0): [<94e613c4>]
copy_process+0x945/0x1a7d
[ 109.553489][ T781] softirqs last disabled at (0): [<00000000>] 0x0
[ 109.553491][ T781] ---[ end trace 0000000000000000 ]---
[ 109.553494][ T781] ------------[ cut here ]------------
[ 109.553496][ T781] rcutorture_one_extend_check after change: Current 0x60
To add 0x60 To remove 0x4 preempt_count() 0x2
[ 109.553510][ T781] WARNING: CPU: 1 PID: 781 at kernel/rcu/rcutorture.c:1902
rcutorture_one_extend_check+0x20d/0x267 [rcutorture]
[ 109.553517][ T781] Modules linked in: rcutorture(+) torture
[ 109.553520][ T781] CPU: 1 UID: 0 PID: 781 Comm: rcu_torture_rea Tainted: G
W T 6.14.0-rc1-00007-gc9b55f9da0d2 #1
[ 109.553523][ T781] Tainted: [W]=WARN, [T]=RANDSTRUCT
[ 109.553524][ T781] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 109.553525][ T781] EIP: rcutorture_one_extend_check+0x20d/0x267 [rcutorture]
[ 109.553530][ T781] Code: 3d fe 04 1c f1 00 75 27 25 ff ff ff 7f c6 05 fe 04
1c f1 01 50 ff 75 08 57 53 56 68 60 9f 1c f1 68 a4 74 1c f1 e8 da d3 ca a3 <0f>
0b 83 c4 1c a1 40 09 1c f1 8b 40 1c 85 c0 74 41 f6 c3 60 75 3c
[ 109.553532][ T781] EAX: 00000067 EBX: 00000060 ECX: 00000027 EDX: e89c1a00
[ 109.553533][ T781] ESI: f11c936d EDI: 00000060 EBP: 825d1d88 ESP: 825d1d54
[ 109.553535][ T781] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS:
00010282
[ 109.553537][ T781] CR0: 80050033 CR2: 77235000 CR3: 010c5000 CR4: 00040690
[ 109.553539][ T781] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 109.553540][ T781] DR6: fffe0ff0 DR7: 00000400
[ 109.553541][ T781] Call Trace:
[ 109.553543][ T781] ? show_regs+0x4c/0x52
[ 109.553545][ T781] ? rcutorture_one_extend_check+0x20d/0x267 [rcutorture]
[ 109.553551][ T781] ? __warn+0x9e/0x15f
[ 109.553555][ T781] ? report_bug+0xe8/0x14a
[ 109.553558][ T781] ? rcutorture_one_extend_check+0x20d/0x267 [rcutorture]
[ 109.553565][ T781] ? exc_overflow+0x37/0x37
[ 109.553567][ T781] ? handle_bug+0x3a/0x55
[ 109.553569][ T781] ? exc_invalid_op+0x1a/0x56
[ 109.553572][ T781] ? handle_exception+0x148/0x148
[ 109.553575][ T781] ? osq_wait_next+0x18/0x41
[ 109.553578][ T781] ? exc_overflow+0x37/0x37
[ 109.553580][ T781] ? rcutorture_one_extend_check+0x20d/0x267 [rcutorture]
[ 109.553587][ T781] ? exc_overflow+0x37/0x37
[ 109.553589][ T781] ? rcutorture_one_extend_check+0x20d/0x267 [rcutorture]
[ 109.553599][ T781] rcutorture_one_extend+0x3b7/0x3c1 [rcutorture]
[ 109.553610][ T781] rcu_torture_one_read+0x21b/0x4d2 [rcutorture]
[ 109.553638][ T781] rcu_torture_reader+0xc4/0xdbd [rcutorture]
[ 109.553646][ T781] ? rcu_torture_one_read+0x4d2/0x4d2 [rcutorture]
[ 109.553655][ T781] kthread+0x169/0x16e
[ 109.553658][ T781] ? rcu_torture_read_exit_child+0x3a/0x3a [rcutorture]
[ 109.553664][ T781] ? kthread_is_per_cpu+0x17/0x17
[ 109.553667][ T781] ret_from_fork+0x19/0x2c
[ 109.553669][ T781] ? kthread_is_per_cpu+0x17/0x17
[ 109.553671][ T781] ret_from_fork_asm+0x12/0x20
[ 109.553673][ T781] entry_INT80_32+0x108/0x108
[ 109.553679][ T781] irq event stamp: 607
[ 109.553680][ T781] hardirqs last enabled at (613): [<94ebb6cb>]
console_trylock_spinning+0x6b/0x10a
[ 109.553682][ T781] hardirqs last disabled at (618): [<94ebb691>]
console_trylock_spinning+0x31/0x10a
[ 109.553684][ T781] softirqs last enabled at (0): [<94e613c4>]
copy_process+0x945/0x1a7d
[ 109.553686][ T781] softirqs last disabled at (0): [<00000000>] 0x0
[ 109.553688][ T781] ---[ end trace 0000000000000000 ]---
[ 109.634034][ T769] rcu-torture: Creating torture_shuffle task
[ 109.635952][ T782] rcu-torture: rcu_torture_stats task started
[ 109.637994][ T769] rcu-torture: Creating torture_stutter task
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
