2e912161bd ("x86/mm/64: Fix an incorrect warning with .."): WARNING: CPU: 0 PID: 0 at arch/x86/mm/tlb.c:265 initialize_tlbstate_and_flush
by kernel test robot
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/fixes
commit 2e912161bd29ce6b3e7dc5fbb921cc912ea20e29
Author: Andy Lutomirski <luto(a)kernel.org>
AuthorDate: Sat Sep 9 21:31:44 2017 -0700
Commit: Andy Lutomirski <luto(a)kernel.org>
CommitDate: Sun Sep 10 08:51:48 2017 -0700
x86/mm/64: Fix an incorrect warning with CONFIG_DEBUG_VM=y, !PCID
I've been staring at the word PCID too long.
Fixes: f13c8e8c58ba ("x86/mm: Reinitialize TLB state on hotplug and resume")
Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com>
Signed-off-by: Andy Lutomirski <luto(a)kernel.org>
7fc3e11639 x86/hibernate/64: Mask off CR3's PCID bits in the saved CR3
2e912161bd x86/mm/64: Fix an incorrect warning with CONFIG_DEBUG_VM=y, !PCID
2e912161bd x86/mm/64: Fix an incorrect warning with CONFIG_DEBUG_VM=y, !PCID
+-------------------------------------------------------------+------------+------------+------------+
| | 7fc3e11639 | 2e912161bd | 2e912161bd |
+-------------------------------------------------------------+------------+------------+------------+
| boot_successes | 0 | 0 | 0 |
| boot_failures | 0 | 13 | 13 |
| WARNING:at_arch/x86/mm/tlb.c:#initialize_tlbstate_and_flush | 0 | 13 | 13 |
+-------------------------------------------------------------+------------+------------+------------+
[ 0.000000] sysrq: sysrq always enabled.
[ 0.000000] PID hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.000000] Dentry cache hash table entries: 65536 (order: 7, 524288 bytes)
[ 0.000000] Inode-cache hash table entries: 32768 (order: 6, 262144 bytes)
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: CPU: 0 PID: 0 at arch/x86/mm/tlb.c:265 initialize_tlbstate_and_flush+0x155/0x170
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.13.0-04263-g2e91216 #954
[ 0.000000] task: ffffffff84622580 task.stack: ffffffff84600000
[ 0.000000] RIP: 0010:initialize_tlbstate_and_flush+0x155/0x170
[ 0.000000] RSP: 0000:ffffffff84603ea0 EFLAGS: 00010082
[ 0.000000] RAX: 00000000000406b0 RBX: 000000001d41d000 RCX: 0000000000000001
[ 0.000000] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff848a8808
[ 0.000000] RBP: ffffffff8476c2c0 R08: 0000000000000001 R09: 0000000000000000
[ 0.000000] R10: 0000000000000008 R11: 0000000000000000 R12: 0000000000000000
[ 0.000000] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88001fa0c3a0
[ 0.000000] FS: 0000000000000000(0000) GS:ffff88001fa00000(0000) knlGS:0000000000000000
[ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.000000] CR2: ffff88001eb89000 CR3: 000000001d41d000 CR4: 00000000000406b0
[ 0.000000] Call Trace:
[ 0.000000] ? cpu_init+0x251/0x3f0
[ 0.000000] ? trap_init+0x39/0x49
[ 0.000000] ? start_kernel+0x29a/0x5ef
[ 0.000000] ? secondary_startup_64+0xa5/0xa5
[ 0.000000] Code: 00 00 65 48 89 05 04 69 9c 7c 5b 5d 41 5c 41 5d 41 5e c3 b9 01 00 00 00 31 d2 be 01 00 00 00 48 c7 c7 08 88 8a 84 e8 9b f2 10 00 <0f> ff be 01 00 00 00 e9 48 ff ff ff 0f ff e9 f6 fe ff ff 0f 1f
[ 0.000000] random: get_random_bytes called from print_oops_end_marker+0x34/0x50 with crng_init=0
[ 0.000000] ---[ end trace 0000000000000000 ]---
[ 0.000000] Memory: 471380K/523712K available (8518K kernel code, 3504K rwdata, 4176K rodata, 1140K init, 19352K bss, 52332K reserved, 0K cma-reserved)
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start 2e912161bd29ce6b3e7dc5fbb921cc912ea20e29 e7d0c41ecc2e372a81741a30894f556afec24315 --
git bisect good 1e2cd2e61130f8d8d120ef926143ac18af8e534b # 01:08 G 11 0 11 35 back up some ldt_gdt test work
git bisect good 5d6f75b4405a844271a56aa5bf90ddd5e4e543b3 # 01:22 G 11 0 11 13 x86/mm: Get rid of VM_BUG_ON in switch_tlb_irqs_off()
git bisect good 7fc3e1163965275bf251dd6682cc3f58ae66beb4 # 01:43 G 11 0 11 37 x86/hibernate/64: Mask off CR3's PCID bits in the saved CR3
# first bad commit: [2e912161bd29ce6b3e7dc5fbb921cc912ea20e29] x86/mm/64: Fix an incorrect warning with CONFIG_DEBUG_VM=y, !PCID
git bisect good 7fc3e1163965275bf251dd6682cc3f58ae66beb4 # 01:59 G 31 0 31 68 x86/hibernate/64: Mask off CR3's PCID bits in the saved CR3
# extra tests with CONFIG_DEBUG_INFO_REDUCED
git bisect bad 2e912161bd29ce6b3e7dc5fbb921cc912ea20e29 # 02:10 B 0 1 19 5 x86/mm/64: Fix an incorrect warning with CONFIG_DEBUG_VM=y, !PCID
# extra tests on HEAD of luto/x86/fixes
git bisect bad 2e912161bd29ce6b3e7dc5fbb921cc912ea20e29 # 02:15 B 0 13 41 10 x86/mm/64: Fix an incorrect warning with CONFIG_DEBUG_VM=y, !PCID
# extra tests on tree/branch luto/x86/fixes
git bisect bad 2e912161bd29ce6b3e7dc5fbb921cc912ea20e29 # 02:15 B 0 13 41 10 x86/mm/64: Fix an incorrect warning with CONFIG_DEBUG_VM=y, !PCID
# extra tests with first bad commit reverted
git bisect good c83a138a348dcd0995c372d4a11d0a09686acff2 # 02:32 G 11 0 11 11 Revert "x86/mm/64: Fix an incorrect warning with CONFIG_DEBUG_VM=y, !PCID"
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
2 years, 6 months
[lkp-robot] [sched/fair] 6d46bd3d97: netperf.Throughput_tps -11.3% regression
by kernel test robot
Greeting,
FYI, we noticed a -11.3% regression of netperf.Throughput_tps due to commit:
commit: 6d46bd3d9705555382b83554b56a34f231d5d1dd ("sched/fair: Improve the behavior of sync flag")
url: https://github.com/0day-ci/linux/commits/Joel-Fernandes/sched-fair-Improv...
in testcase: netperf
on test machine: 8 threads Intel(R) Atom(TM) CPU C2750 @ 2.40GHz with 16G memory
with following parameters:
ip: ipv4
runtime: 300s
nr_threads: 25%
cluster: cs-localhost
test: TCP_CRR
cpufreq_governor: performance
test-description: Netperf is a benchmark that can be use to measure various aspect of networking performance.
test-url: http://www.netperf.org/netperf/
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
testcase/path_params/tbox_group/run: netperf/ipv4-300s-25%-cs-localhost-TCP_CRR-performance/lkp-avoton3
9c8783201cb58e9a 6d46bd3d9705555382b83554b5
---------------- --------------------------
6829 -11% 6054 netperf.Throughput_tps
68768 ± 7% 10484% 7278249 netperf.time.involuntary_context_switches
165 -28% 119 netperf.time.percent_of_cpu_this_job_got
497 -29% 354 netperf.time.system_time
4106701 -100% 17497 ± 3% netperf.time.voluntary_context_switches
8921 8696 vmstat.system.in
62311 -21% 49214 vmstat.system.cs
11.61 3% 12.00 boot-time.dhcp
12.69 3% 13.08 boot-time.kernel_boot
193 3% 198 boot-time.idle
27.06 27.81 boot-time.boot
11950 399% 59639 perf-stat.cpu-migrations
0.22 10% 0.25 perf-stat.ipc
1.62 1.58 perf-stat.iTLB-load-miss-rate%
4.49 -9% 4.08 perf-stat.cpi
1.19 ± 5% -14% 1.03 perf-stat.cache-miss-rate%
8.983e+10 -14% 7.732e+10 perf-stat.branch-instructions
4.855e+11 -14% 4.166e+11 perf-stat.iTLB-loads
4.857e+11 -15% 4.145e+11 perf-stat.instructions
7.988e+09 -17% 6.669e+09 perf-stat.iTLB-load-misses
7.348e+10 -20% 5.849e+10 perf-stat.cache-references
19124461 -21% 15098659 perf-stat.context-switches
2.181e+12 -23% 1.69e+12 perf-stat.cpu-cycles
12.15 -25% 9.15 perf-stat.branch-miss-rate%
8.72e+08 ± 5% -31% 6.002e+08 perf-stat.cache-misses
1.091e+10 -35% 7.072e+09 perf-stat.branch-misses
Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.
Thanks,
Xiaolong
2 years, 6 months
[lkp-robot] [x86/asm/64] 74cc41d3b6: BUG:unable_to_handle_kernel
by kernel test robot
FYI, we noticed the following commit:
commit: 74cc41d3b6a99fa2caa4e4edc82efea4d13b8d55 ("x86/asm/64: Remove all remaining direct thread_struct::sp0 reads")
https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git x86/entry_consolidation
in testcase: trinity
with following parameters:
runtime: 300s
test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/
on test machine: qemu-system-i386 -enable-kvm -m 256M
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+------------------------------------------+------------+------------+
| | 09fc4173ee | 74cc41d3b6 |
+------------------------------------------+------------+------------+
| boot_successes | 6 | 2 |
| boot_failures | 0 | 8 |
| BUG:unable_to_handle_kernel | 0 | 8 |
| Oops:#[##] | 0 | 8 |
| EIP:__switch_to | 0 | 8 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 8 |
+------------------------------------------+------------+------------+
[ 0.318080] BUG: unable to handle kernel paging request at 8f2b0258
[ 0.318845] IP: __switch_to+0x202/0x483
[ 0.319000] *pde = 0f7d2067
[ 0.319000] *pte = 0f2b0060
[ 0.319000]
[ 0.319000] Oops: 0000 [#1] DEBUG_PAGEALLOC
[ 0.319000] Modules linked in:
[ 0.319000] CPU: 0 PID: 19 Comm: watchdogd Not tainted 4.13.0-rc4-00146-g74cc41d #1
[ 0.319000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 0.319000] task: 8f2a8040 task.stack: 8f29e000
[ 0.319000] EIP: __switch_to+0x202/0x483
[ 0.319000] EFLAGS: 00210046 CPU: 0
[ 0.319000] EAX: 8f2aee40 EBX: 00000000 ECX: 00000000 EDX: 00000000
[ 0.319000] ESI: 8f2aee40 EDI: 8f2a8a40 EBP: 8f2a5fa4 ESP: 8f2a5f80
[ 0.319000] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
[ 0.319000] CR0: 80050033 CR2: 000000a0 CR3: 02007000 CR4: 00000690
[ 0.319000] Call Trace:
[ 0.319000] Code: 00 31 c9 b8 f8 4a ed 81 89 da e8 76 6a 09 00 85 db 58 74 0f 8b 45 ec b9 80 0e de 81 89 f2 e8 07 72 00 00 89 f0 8d b6 00 00 00 00 <8b> 86 18 14 00 00 e8 43 93 01 00 90 66 a1 90 0e de 81 0f b7 c0
[ 0.319000] EIP: __switch_to+0x202/0x483 SS:ESP: 0068:8f2a5f80
[ 0.319000] CR2: 000000008f2b0258
[ 0.319000] ---[ end trace 69022ea50e23af3d ]---
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Xiaolong
2 years, 6 months
[lkp-robot] [x86/mm] 72c0098d92: WARNING:at_arch/x86/mm/tlb.c:#initialize_tlbstate_and_flush
by kernel test robot
FYI, we noticed the following commit:
commit: 72c0098d92cedb11c7e0151e84918840a4e96b31 ("x86/mm: Reinitialize TLB state on hotplug and resume")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -m 420M
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------------------------------------+------------+------------+
| | 80cee03bf1 | 72c0098d92 |
+-------------------------------------------------------------+------------+------------+
| boot_successes | 8 | 0 |
| boot_failures | 0 | 8 |
| WARNING:at_arch/x86/mm/tlb.c:#initialize_tlbstate_and_flush | 0 | 8 |
+-------------------------------------------------------------+------------+------------+
[ 0.000000] WARNING: CPU: 0 PID: 0 at arch/x86/mm/tlb.c:245 initialize_tlbstate_and_flush+0x68/0xdd
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.13.0-06467-g72c0098 #1
[ 0.000000] task: ffffffff82a74500 task.stack: ffffffff82a00000
[ 0.000000] RIP: 0010:initialize_tlbstate_and_flush+0x68/0xdd
[ 0.000000] RSP: 0000:ffffffff82a03e90 EFLAGS: 00010002
[ 0.000000] RAX: 0000000002a6f000 RBX: ffffffff82c78da0 RCX: 0000000002a6f000
[ 0.000000] RDX: 00000000000006b0 RSI: 0000000000000000 RDI: 000000000000001b
[ 0.000000] RBP: ffffffff82a03ea0 R08: 0000000000000001 R09: 0000000000000000
[ 0.000000] R10: ffffffff82a03e90 R11: ffff88001a0af000 R12: 0000000000000000
[ 0.000000] R13: ffffffff82f10960 R14: ffff88001a17d4c0 R15: 0000000000000000
[ 0.000000] FS: 0000000000000000(0000) GS:ffffffff82a91000(0000) knlGS:0000000000000000
[ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.000000] CR2: ffff880004309000 CR3: 0000000002a6f000 CR4: 00000000000006b0
[ 0.000000] Call Trace:
[ 0.000000] cpu_init+0x165/0x284
[ 0.000000] ? set_pte_vaddr+0x28/0x2a
[ 0.000000] trap_init+0x3f/0x51
[ 0.000000] start_kernel+0x230/0x43b
[ 0.000000] x86_64_start_reservations+0x2a/0x2c
[ 0.000000] x86_64_start_kernel+0x75/0x78
[ 0.000000] secondary_startup_64+0xa5/0xa5
[ 0.000000] Code: 00 00 00 80 ff 77 00 00 48 01 f2 48 39 d1 74 02 0f ff 48 8b 15 2c 59 e1 01 80 e2 01 74 0f 48 8b 15 5c 4c a6 01 0f ba e2 11 72 02 <0f> ff 48 25 00 f0 ff ff 48 89 c7 ff 14 25 b8 49 81 82 66 c7 05
[ 0.000000] random: get_random_bytes called from init_oops_id+0x21/0x36 with crng_init=0
[ 0.000000] ---[ end trace 0000000000000000 ]---
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Xiaolong
2 years, 6 months
[lkp-robot] [ACPI / CPPC] 266c175b9b: BUG:KASAN:null-ptr-deref
by kernel test robot
FYI, we noticed the following commit:
commit: 266c175b9b3242f472f0ae5260a97cf62747a1d1 ("ACPI / CPPC: Make cppc acpi driver aware of pcc subspace ids")
url: https://github.com/0day-ci/linux/commits/George-Cherian/mailbox-PCC-Move-...
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap -smp 2 -m 1G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+------------------------------------------+------------+------------+
| | 91805fa192 | 266c175b9b |
+------------------------------------------+------------+------------+
| boot_successes | 10 | 0 |
| boot_failures | 0 | 12 |
| BUG:KASAN:null-ptr-deref | 0 | 12 |
| BUG:unable_to_handle_kernel | 0 | 12 |
| Oops:#[##] | 0 | 12 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 12 |
+------------------------------------------+------------+------------+
[ 37.051995] BUG: KASAN: null-ptr-deref in acpi_cppc_processor_exit+0x71/0x185
[ 37.053134] Read of size 1 at addr 0000000000000014 by task swapper/0/1
[ 37.054195]
[ 37.054455] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.13.0-06468-g266c175 #1
[ 37.054546] Call Trace:
[ 37.054546] dump_stack+0x85/0xbe
[ 37.054546] kasan_report+0x21e/0x253
[ 37.054546] __asan_load1+0x45/0x47
[ 37.054546] acpi_cppc_processor_exit+0x71/0x185
[ 37.054546] acpi_processor_stop+0x9d/0xa4
[ 37.054546] driver_probe_device+0x228/0x481
[ 37.054546] __driver_attach+0x9f/0xc9
[ 37.054546] ? driver_probe_device+0x481/0x481
[ 37.054546] bus_for_each_dev+0x89/0xa9
[ 37.054546] driver_attach+0x26/0x29
[ 37.054546] bus_add_driver+0x19b/0x2bd
[ 37.054546] driver_register+0x103/0x151
[ 37.054546] ? acpi_video_init+0xb2/0xb2
[ 37.054546] acpi_processor_driver_init+0x28/0x9d
[ 37.054546] do_one_initcall+0x9a/0x145
[ 37.054546] kernel_init_freeable+0x1ab/0x23c
[ 37.054546] ? rest_init+0x235/0x235
[ 37.054546] kernel_init+0xc/0x108
[ 37.054546] ? rest_init+0x235/0x235
[ 37.054546] ret_from_fork+0x2a/0x40
[ 37.054546] ==================================================================
[ 37.069690] BUG: unable to handle kernel NULL pointer dereference at 0000000000000014
[ 37.070969] IP: acpi_cppc_processor_exit+0x71/0x185
[ 37.071770] PGD 0 P4D 0
[ 37.072205] Oops: 0000 [#1] SMP KASAN
[ 37.072802] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G B 4.13.0-06468-g266c175 #1
[ 37.073659] task: ffff88002aea0000 task.stack: ffff88002aea8000
[ 37.073659] RIP: 0010:acpi_cppc_processor_exit+0x71/0x185
[ 37.073659] RSP: 0000:ffff88002aeafcd0 EFLAGS: 00010256
[ 37.073659] RAX: 0000000000000296 RBX: 0000000000000000 RCX: ffffffff8252bab2
[ 37.073659] RDX: 1ffffffff09aa1d0 RSI: 0000000000000003 RDI: 0000000000000296
[ 37.073659] RBP: ffff88002aeafcf8 R08: dffffc0000000000 R09: 0000000000000001
[ 37.073659] R10: ffffed00055d5f83 R11: ffffffff85f7c750 R12: ffff880029d54900
[ 37.073659] R13: ffff880029d54910 R14: 0000000000000000 R15: ffffffff8693b800
[ 37.073659] FS: 0000000000000000(0000) GS:ffff88002b000000(0000) knlGS:0000000000000000
[ 37.073659] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 37.073659] CR2: 0000000000000014 CR3: 0000000026a83000 CR4: 00000000000606b0
[ 37.073659] Call Trace:
[ 37.073659] acpi_processor_stop+0x9d/0xa4
[ 37.073659] driver_probe_device+0x228/0x481
[ 37.073659] __driver_attach+0x9f/0xc9
[ 37.073659] ? driver_probe_device+0x481/0x481
[ 37.073659] bus_for_each_dev+0x89/0xa9
[ 37.073659] driver_attach+0x26/0x29
[ 37.073659] bus_add_driver+0x19b/0x2bd
[ 37.073659] driver_register+0x103/0x151
[ 37.073659] ? acpi_video_init+0xb2/0xb2
[ 37.073659] acpi_processor_driver_init+0x28/0x9d
[ 37.073659] do_one_initcall+0x9a/0x145
[ 37.073659] kernel_init_freeable+0x1ab/0x23c
[ 37.073659] ? rest_init+0x235/0x235
[ 37.073659] kernel_init+0xc/0x108
[ 37.073659] ? rest_init+0x235/0x235
[ 37.073659] ret_from_fork+0x2a/0x40
[ 37.073659] Code: 63 1b 85 db 0f 88 9c 00 00 00 4c 8d 3c dd 00 b8 93 86 4c 89 ff e8 46 ce b4 ff 4c 8b 34 dd 00 b8 93 86 49 8d 7e 14 e8 9c cb b4 ff <41> 80 7e 14 00 74 74 49 8d be 5c 01 00 00 e8 19 cd b4 ff 41 ff
[ 37.073659] RIP: acpi_cppc_processor_exit+0x71/0x185 RSP: ffff88002aeafcd0
[ 37.073659] CR2: 0000000000000014
[ 37.073659] ---[ end trace 0a860a241596ffde ]---
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Xiaolong
2 years, 6 months
[lkp-robot] [sched/fair] 6c362d9657: netperf.Throughput_Mbps -10.1% regression
by kernel test robot
Greeting,
FYI, we noticed a -10.1% regression of netperf.Throughput_Mbps due to commit:
commit: 6c362d9657293d700a8299acbeb2f1e24378f488 ("sched/fair: Fix wake_affine() for !NUMA_BALANCING")
git://anongit.freedesktop.org/drm-intel topic/core-for-CI
in testcase: netperf
on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 8G memory
with following parameters:
ip: ipv4
runtime: 300s
nr_threads: 200%
cluster: cs-localhost
test: TCP_SENDFILE
cpufreq_governor: performance
test-description: Netperf is a benchmark that can be use to measure various aspect of networking performance.
test-url: http://www.netperf.org/netperf/
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
testcase/path_params/tbox_group/run: netperf/ipv4-300s-200%-cs-localhost-TCP_SENDFILE-performance/lkp-bdw-de1
0e8e8706dfe2a17a 6c362d9657293d700a8299acbe
---------------- --------------------------
11039 -10% 9929 netperf.Throughput_Mbps
36660 ± 20% 1257% 497519 netperf.time.involuntary_context_switches
7069 6997 netperf.time.minor_page_faults
2899 -6% 2734 netperf.time.system_time
983 -6% 925 netperf.time.percent_of_cpu_this_job_got
62.39 -13% 54.04 netperf.time.user_time
3137334 -63% 1171532 netperf.time.voluntary_context_switches
16915 46% 24638 vmstat.system.in
31608 69% 53301 vmstat.system.cs
64003 ± 6% 443% 347394 perf-stat.cpu-migrations
35981 ± 6% 205% 109811 ± 4% perf-stat.instructions-per-iTLB-miss
0.16 63% 0.25 perf-stat.branch-miss-rate%
2.538e+09 57% 3.977e+09 perf-stat.branch-misses
0.81 -4% 0.77 perf-stat.ipc
1.24 5% 1.30 perf-stat.cpi
370027 364969 perf-stat.page-faults
370025 364952 perf-stat.minor-faults
2.094e+12 -6% 1.97e+12 perf-stat.dTLB-stores
3.212e+12 -5% 3.04e+12 perf-stat.dTLB-loads
1.632e+12 -4% 1.566e+12 perf-stat.branch-instructions
8.997e+12 -4% 8.606e+12 perf-stat.instructions
1.874e+11 11% 2.079e+11 perf-stat.cache-references
1.874e+11 11% 2.079e+11 perf-stat.cache-misses
8.82 ± 6% -82% 1.59 ± 5% perf-stat.iTLB-load-miss-rate%
0.00 157% 0.01 perf-stat.dTLB-load-miss-rate%
1.104e+08 143% 2.682e+08 perf-stat.dTLB-load-misses
2.511e+08 ± 6% -69% 78564886 ± 5% perf-stat.iTLB-load-misses
2.594e+09 88% 4.87e+09 perf-stat.iTLB-loads
9571397 69% 16145347 perf-stat.context-switches
Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.
Thanks,
Xiaolong
2 years, 6 months
[lkp-robot] [x86/mm] f13c8e8c58: WARNING:at_arch/x86/mm/tlb.c:#initialize_tlbstate_and_flush
by kernel test robot
FYI, we noticed the following commit:
commit: f13c8e8c58ba3b535f1e4cb9e62b50ab37dd69bb ("x86/mm: Reinitialize TLB state on hotplug and resume")
https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git x86/fixes
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -m 420M
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------------------------------------+------------+------------+
| | e7d0c41ecc | f13c8e8c58 |
+-------------------------------------------------------------+------------+------------+
| boot_successes | 0 | 0 |
| boot_failures | 8 | 8 |
| BUG:-#unexpected_failures(out_of#)-debugging_disabled!| | 8 | 8 |
| WARNING:at_arch/x86/mm/tlb.c:#initialize_tlbstate_and_flush | 0 | 8 |
+-------------------------------------------------------------+------------+------------+
[ 0.000000] WARNING: CPU: 0 PID: 0 at arch/x86/mm/tlb.c:245 initialize_tlbstate_and_flush+0x54/0xd1
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.13.0-04258-gf13c8e8 #1
[ 0.000000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 0.000000] task: ffffffff89a14500 task.stack: ffffffff89a00000
[ 0.000000] RIP: 0010:initialize_tlbstate_and_flush+0x54/0xd1
[ 0.000000] RSP: 0000:ffffffff89a03e78 EFLAGS: 00010002
[ 0.000000] RAX: 00000000000006b0 RBX: ffffffff89a5a4a0 RCX: 0000000004a0f000
[ 0.000000] RDX: 0000000004a0f000 RSI: 0000000000001000 RDI: 0000000009a0f000
[ 0.000000] RBP: ffffffff89a03e88 R08: 0000000000000000 R09: ffff8e73195bdc40
[ 0.000000] R10: ffffffff89a03e90 R11: ffffffff8a4fd72c R12: 0000000000000000
[ 0.000000] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff89a14500
[ 0.000000] FS: 0000000000000000(0000) GS:ffff8e7319200000(0000) knlGS:0000000000000000
[ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.000000] CR2: ffff8e7305db1000 CR3: 0000000004a0f000 CR4: 00000000000006b0
[ 0.000000] Call Trace:
[ 0.000000] cpu_init+0x1b3/0x2d2
[ 0.000000] trap_init+0x3f/0x51
[ 0.000000] start_kernel+0x275/0x4dc
[ 0.000000] x86_64_start_reservations+0x24/0x26
[ 0.000000] x86_64_start_kernel+0x6e/0x71
[ 0.000000] secondary_startup_64+0xa5/0xa5
[ 0.000000] Code: 00 f0 ff ff ff ff ff 7f 48 21 ca 48 39 c2 74 02 0f ff 48 8b 05 d2 74 ac 00 a8 01 74 10 65 48 8b 05 c2 1f fe 76 0f ba e0 11 72 02 <0f> ff 48 81 e1 00 f0 ff ff 48 89 cf e8 ad f9 ff ff 48 8b 83 80
[ 0.000000] ---[ end trace 51518f681227b679 ]---
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Xiaolong
2 years, 6 months
b00ac4eee3 ("HACK: system-power: Add debug messages"): BUG: kernel hang in test stage
by kernel test robot
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
https://github.com/thierryreding/linux for-4.14/work
commit b00ac4eee3d73e6e92c7e7c912003d2e9fbf52f0
Author: Thierry Reding <treding(a)nvidia.com>
AuthorDate: Mon Jan 30 12:41:04 2017 +0100
Commit: Thierry Reding <treding(a)nvidia.com>
CommitDate: Fri Sep 8 09:35:15 2017 +0200
HACK: system-power: Add debug messages
Signed-off-by: Thierry Reding <treding(a)nvidia.com>
cd0eb5b4d4 power: reset: Add MAX77620 support
b00ac4eee3 HACK: system-power: Add debug messages
cbe061aee5 WIP
+-------------------------------+------------+------------+------------+
| | cd0eb5b4d4 | b00ac4eee3 | cbe061aee5 |
+-------------------------------+------------+------------+------------+
| boot_successes | 0 | 0 | 0 |
| boot_failures | 0 | 11 | 11 |
| BUG:kernel_hang_in_test_stage | 0 | 11 | 11 |
+-------------------------------+------------+------------+------------+
[ 11.753030] reboot: Power down
[ 11.754634] system-power: > system_power_off()
[ 11.755458] system-power: ACPI: preparing to power off...
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start 8c0257613667ce3e5d198cc214d1364f727e15ba 58bcd35f859bdb69da2b20df042a2d3575c784fe --
git bisect bad b40005c9d26b65fb7b35da426b66b5f2cc3cc91a # 06:45 B 0 11 24 0 Merge 'wireless-testsing2/master' into devel-catchup-201709090323
git bisect bad 518a834e509d19afbed4b2dcfda6ec0162ab3783 # 07:30 B 0 11 24 0 Merge 'ulf.hansson-mmc/next' into devel-catchup-201709090323
git bisect bad 3852e8457731b7d28c9c14324ee389cca516dade # 08:11 B 0 9 23 0 Merge 'linux-nvme/master' into devel-catchup-201709090323
git bisect good 7b7825555b010208a46c95025840f4fe76cbf8bc # 08:27 G 11 0 0 0 0day base guard for 'devel-catchup-201709090323'
git bisect bad 1b3d508469b28c68b5269a30c30909090a87d596 # 09:14 B 0 7 20 0 Merge 'thierryreding/for-4.14/work' into devel-catchup-201709090323
git bisect bad dbec86eeb751403dae5b6675aa1d384c30d544aa # 09:53 B 0 1 14 0 usb: host: xhci-tegra: Add Tegra186 XUSB support
git bisect bad 8aa6dc254ff72a9b9e27b737ad8540b5006710c9 # 10:45 B 0 11 24 0 arm64: tegra: Mark PMIC as system power controller on P3310
git bisect good ab21e4905b736b03063c7774edd3f7c88ff21b1b # 10:56 G 11 0 11 11 powerpc: Move to system-power framework
git bisect good dbc55eb14a29acc0d2131f966837d4edd1e9fab9 # 11:35 G 11 0 11 13 power: reset: gpio-restart: Move to system-power framework
git bisect good 9c60a5737051662c52e34a4e043c9c90bfe1f699 # 11:53 G 11 0 11 13 soc/tegra: pmc: Move to system-power framework
git bisect bad b00ac4eee3d73e6e92c7e7c912003d2e9fbf52f0 # 12:47 B 0 11 24 0 HACK: system-power: Add debug messages
git bisect good cd0eb5b4d4957b03032e951f0a5617fb0d6fbed9 # 13:02 G 11 0 11 11 power: reset: Add MAX77620 support
# first bad commit: [b00ac4eee3d73e6e92c7e7c912003d2e9fbf52f0] HACK: system-power: Add debug messages
git bisect good cd0eb5b4d4957b03032e951f0a5617fb0d6fbed9 # 13:26 G 33 0 33 48 power: reset: Add MAX77620 support
# extra tests with CONFIG_DEBUG_INFO_REDUCED
git bisect bad b00ac4eee3d73e6e92c7e7c912003d2e9fbf52f0 # 14:12 B 0 11 24 0 HACK: system-power: Add debug messages
# extra tests on HEAD of linux-devel/devel-catchup-201709090323
git bisect bad 8c0257613667ce3e5d198cc214d1364f727e15ba # 14:12 B 0 13 29 0 0day head guard for 'devel-catchup-201709090323'
# extra tests on tree/branch thierryreding/for-4.14/work
git bisect bad cbe061aee535ed5709075eb5ab6aea9f8e542d26 # 15:12 B 0 6 19 0 WIP
# extra tests with first bad commit reverted
git bisect good a38253c0449d3be36c390d5464114e8715629d05 # 15:47 G 11 0 11 11 Revert "HACK: system-power: Add debug messages"
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
2 years, 6 months
2684e8ffff ("dbg smp boot"): BUG: unable to handle kernel paging request at 4e1e3093
by kernel test robot
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
yhuang/smp_init_async_1d
commit 2684e8ffff30d14c8b33e89a0f8c71105369f9c4
Author: Huang Ying <ying.huang(a)intel.com>
AuthorDate: Thu Sep 7 13:49:39 2017 +0800
Commit: Huang Ying <ying.huang(a)intel.com>
CommitDate: Thu Sep 7 15:00:10 2017 +0800
dbg smp boot
21923329ea smp: Boot some APs asynchronously
2684e8ffff dbg smp boot
2684e8ffff dbg smp boot
+------------------------------------------+------------+------------+------------+
| | 21923329ea | 2684e8ffff | 2684e8ffff |
+------------------------------------------+------------+------------+------------+
| boot_successes | 35 | 0 | 0 |
| boot_failures | 0 | 15 | 15 |
| BUG:unable_to_handle_kernel | 0 | 15 | 15 |
| Oops:#[##] | 0 | 15 | 15 |
| EIP:background_online_cpus | 0 | 15 | 15 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 15 | 15 |
+------------------------------------------+------------+------------+------------+
[ 2.244982] cryptomgr_probe (106) used greatest stack depth: 7080 bytes left
[ 2.249852] debug: unmapping init [mem 0x4e1cb000-0x4e273fff]
[ 2.250628] Write protecting the kernel text: 7596k
[ 2.251203] Write protecting the kernel read-only data: 3508k
[ 2.251819] NX-protecting the kernel data: 6740k
[ 2.253222] BUG: unable to handle kernel paging request at 4e1e3093
[ 2.253826] IP: background_online_cpus+0x13/0x1b
[ 2.253826] *pdpt = 000000000e27a001 *pde = 000000000eeb0063 *pte = 800000000e1e3062
[ 2.253826] Oops: 0010 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[ 2.253826] CPU: 0 PID: 14 Comm: background_onli Not tainted 4.13.0-02131-g2684e8f #1
[ 2.253826] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 2.253826] task: 4f45c000 task.stack: 4f472000
[ 2.253826] EIP: background_online_cpus+0x13/0x1b
[ 2.253826] EFLAGS: 00010202 CPU: 0
[ 2.253826] EAX: 00000000 EBX: 0069852c ECX: 00000001 EDX: 00000001
[ 2.253826] ESI: 4f457460 EDI: 4f45c000 EBP: 4f473f80 ESP: 4f473f7c
[ 2.253826] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 2.253826] CR0: 80050033 CR2: 4e1e3093 CR3: 0cfabde0 CR4: 000006b0
[ 2.253826] Call Trace:
[ 2.253826] kthread+0x110/0x140
[ 2.253826] ? max_cpus_initial+0x18/0x18
[ 2.253826] ? __kthread_bind+0x40/0x40
[ 2.253826] ret_from_fork+0x19/0x30
[ 2.253826] Code: Bad EIP value.
[ 2.253826] EIP: background_online_cpus+0x13/0x1b SS:ESP: 0068:4f473f7c
[ 2.253826] CR2: 000000004e1e3093
[ 2.253826] ---[ end trace 39cb0991c7d1279f ]---
[ 2.253826] Kernel panic - not syncing: Fatal exception
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start 24bc77491f1524337df7b3b3eea682a329a1230d 569dbb88e80deb68974ef6fdd6a13edb9d686261 --
git bisect good 16f8c0b61fd9af3478b61f7fcb2b295c239c5649 # 04:04 G 11 0 0 0 Merge 'tip/sched/urgent' into devel-catchup-201709071750
git bisect bad bb823a735ddc42d08b9dc9a22eff6d0bc4707230 # 04:15 B 0 11 27 4 Merge 'sound/for-next' into devel-catchup-201709071750
git bisect good 3c8d3370c3babf0e380ee7a617b1698f3f7232b3 # 04:34 G 10 0 0 0 Merge 'tip/WIP.x86/apic' into devel-catchup-201709071750
git bisect bad 806a33e9aa6ffb7764cfe577e8ca1e58649211d7 # 04:43 B 0 2 14 0 Merge 'yhuang/smp_init_async_1d' into devel-catchup-201709071750
git bisect good 21923329eae6f10bce08b446eb5f3fa46562965e # 05:09 G 10 0 0 0 smp: Boot some APs asynchronously
git bisect bad 2684e8ffff30d14c8b33e89a0f8c71105369f9c4 # 05:23 B 0 3 19 4 dbg smp boot
# first bad commit: [2684e8ffff30d14c8b33e89a0f8c71105369f9c4] dbg smp boot
git bisect good 21923329eae6f10bce08b446eb5f3fa46562965e # 05:39 G 30 0 0 0 smp: Boot some APs asynchronously
# extra tests with CONFIG_DEBUG_INFO_REDUCED
git bisect bad 2684e8ffff30d14c8b33e89a0f8c71105369f9c4 # 05:52 B 0 5 21 4 dbg smp boot
# extra tests on HEAD of linux-devel/devel-catchup-201709071750
git bisect bad 24bc77491f1524337df7b3b3eea682a329a1230d # 05:53 B 0 13 28 0 0day head guard for 'devel-catchup-201709071750'
# extra tests on tree/branch yhuang/smp_init_async_1d
git bisect bad 2684e8ffff30d14c8b33e89a0f8c71105369f9c4 # 05:56 B 0 15 27 0 dbg smp boot
# extra tests with first bad commit reverted
git bisect good 7928a6cda72928df348da312cadf6faa282f5629 # 06:07 G 11 0 0 0 Revert "dbg smp boot"
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
2 years, 6 months
6bb824aff6 ("lockdep: Remove unnecessary acquisitions wrt .."): WARNING: CPU: 0 PID: 3 at kernel/locking/lockdep.c:747 look_up_lock_class
by kernel test robot
Greetings,
0day kernel testing robot got the below dmesg and the first bad commit is
https://github.com/0day-ci/linux/commits/Byungchul-Park/Fix-the-workqueue...
commit 6bb824aff6b0a1559c8f0ee210ab27ef9494bee4
Author: Byungchul Park <byungchul.park(a)lge.com>
AuthorDate: Tue Sep 5 11:29:14 2017 +0900
Commit: 0day robot <fengguang.wu(a)intel.com>
CommitDate: Thu Sep 7 21:22:05 2017 +0800
lockdep: Remove unnecessary acquisitions wrt workqueue flush
Workqueue added manual acquisitions to catch deadlock cases. Now
crossrelease was introduced, some of those are redundant because
crossrelease-enabled wait_for_completeion() also does it. Removed it.
Also, lock_map_acquire() in process_one_work() is too strong for
that purpose. lock_map_acquire_might() is enough. Replaced it.
Signed-off-by: Byungchul Park <byungchul.park(a)lge.com>
d2a7bdabf0 lockdep: Introduce lock_acquire_might()
6bb824aff6 lockdep: Remove unnecessary acquisitions wrt workqueue flush
6bb824aff6 lockdep: Remove unnecessary acquisitions wrt workqueue flush
+---------------------------------------------------------+------------+------------+------------+
| | d2a7bdabf0 | 6bb824aff6 | 6bb824aff6 |
+---------------------------------------------------------+------------+------------+------------+
| boot_successes | 35 | 0 | 0 |
| boot_failures | 0 | 15 | 15 |
| WARNING:at_kernel/locking/lockdep.c:#look_up_lock_class | 0 | 15 | 15 |
| EIP:look_up_lock_class | 0 | 15 | 15 |
+---------------------------------------------------------+------------+------------+------------+
[ 20.743234] power_supply test_usb: power_supply_update_gen_leds 1
[ 20.744292] power_supply test_usb: uevent
[ 20.745132] power_supply test_usb: POWER_SUPPLY_NAME=test_usb
[ 20.746203] power_supply test_usb: prop ONLINE=1
[ 20.747053] ------------[ cut here ]------------
[ 20.747808] WARNING: CPU: 0 PID: 3 at kernel/locking/lockdep.c:747 look_up_lock_class+0xdf/0x109
[ 20.749743] Modules linked in:
[ 20.750264] CPU: 0 PID: 3 Comm: kworker/0:0 Not tainted 4.13.0-01629-g6bb824a #1
[ 20.751490] Workqueue: events deferred_probe_work_func
[ 20.752318] task: d5050000 task.stack: d5062000
[ 20.753096] EIP: look_up_lock_class+0xdf/0x109
[ 20.753884] EFLAGS: 00210093 CPU: 0
[ 20.754491] EAX: d1e56877 EBX: d5063f30 ECX: d2446990 EDX: 00000000
[ 20.755690] ESI: d1f232e0 EDI: 00000000 EBP: d5063e40 ESP: d5063e30
[ 20.756749] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
[ 20.757679] CR0: 80050033 CR2: 00000000 CR3: 12001000 CR4: 000006b0
[ 20.758840] Call Trace:
[ 20.759269] register_lock_class+0x56/0x286
[ 20.760005] ? mark_lock+0x1e/0x1af
[ 20.760614] __lock_acquire+0xe9/0xc0e
[ 20.761195] ? find_held_lock+0x24/0x5e
[ 20.761990] ? trace_hardirqs_off_caller+0x2d/0x8d
[ 20.762794] lock_acquire+0xda/0x150
[ 20.763332] ? process_one_work+0x178/0x49d
[ 20.764024] process_one_work+0x1d4/0x49d
[ 20.764739] ? process_one_work+0x178/0x49d
[ 20.765445] process_scheduled_works+0x1e/0x24
[ 20.766242] worker_thread+0x26e/0x30a
[ 20.766878] kthread+0x103/0x108
[ 20.767365] ? create_worker+0x15c/0x15c
[ 20.768041] ? __list_del_entry+0x1c/0x1c
[ 20.768760] ret_from_fork+0x19/0x30
[ 20.769324] Code: d1 e8 af cc 00 00 0f ff 58 5a 31 c9 eb 3d 8b 04 8d 20 42 41 d2 85 c0 89 c1 74 1a 3b 70 10 75 0f 8b 43 0c 39 81 c8 00 00 00 74 20 <0f> ff eb 1c 8b 00 85 c0 75 e0 89 f8 84 c0 75 cf 8b 03 e8 f6 fb
[ 20.772710] ---[ end trace 7abed2303a7fa8d9 ]---
[ 20.773903] rtc_cmos 00:00: setting system clock to 2017-09-08 05:15:01 UTC (1504847701)
# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
git bisect start 1486326ac318de23bc68ba5a9cdc5024f9901abf 569dbb88e80deb68974ef6fdd6a13edb9d686261 --
git bisect bad 084d41951ce039e6c3bcee221e5948ee8213240b # 03:47 B 0 1 14 0 Merge 'kraxel/drm-qxl-atomic' into devel-spot-201709080100
git bisect good fb40bb5e377e1131e5b9f3936c2cd7ae7ff8f922 # 04:06 G 11 0 0 0 Merge 'input/master' into devel-spot-201709080100
git bisect good f26129569db2a0ff61ea6e30d35140942e889fdf # 04:17 G 11 0 0 0 Merge 'jpirko-mlxsw/net_next_queue' into devel-spot-201709080100
git bisect bad 108591c095e19f35ee9682ec156f539f8afd106a # 04:31 B 0 11 24 0 Merge 'trace/for-next' into devel-spot-201709080100
git bisect bad 4f15148cc682713dbb0e1c2ed1f4f1ef2c1adb7f # 04:40 B 0 11 28 4 Merge 'linux-review/Byungchul-Park/Fix-the-workqueue-and-lockdep-annotation-issue/20170907-212201' into devel-spot-201709080100
git bisect good bd0f325436682bcb1ec2900256ce35acf3853c3c # 04:49 G 11 0 0 0 Merge 'linux-review/Brendan-Higgins/arm-npcm-add-basic-support-for-Nuvoton-BMCs/20170907-214055' into devel-spot-201709080100
git bisect good d2a7bdabf016d34e0b234a11aac1b638ee227fda # 05:05 G 11 0 0 0 lockdep: Introduce lock_acquire_might()
git bisect bad 6bb824aff6b0a1559c8f0ee210ab27ef9494bee4 # 05:23 B 0 10 23 1 lockdep: Remove unnecessary acquisitions wrt workqueue flush
# first bad commit: [6bb824aff6b0a1559c8f0ee210ab27ef9494bee4] lockdep: Remove unnecessary acquisitions wrt workqueue flush
git bisect good d2a7bdabf016d34e0b234a11aac1b638ee227fda # 05:27 G 30 0 0 0 lockdep: Introduce lock_acquire_might()
# extra tests with CONFIG_DEBUG_INFO_REDUCED
git bisect bad 6bb824aff6b0a1559c8f0ee210ab27ef9494bee4 # 05:36 B 0 8 24 3 lockdep: Remove unnecessary acquisitions wrt workqueue flush
# extra tests on HEAD of linux-devel/devel-spot-201709080100
git bisect bad 1486326ac318de23bc68ba5a9cdc5024f9901abf # 05:36 B 0 13 29 0 0day head guard for 'devel-spot-201709080100'
# extra tests on tree/branch linux-review/Byungchul-Park/Fix-the-workqueue-and-lockdep-annotation-issue/20170907-212201
git bisect bad 6bb824aff6b0a1559c8f0ee210ab27ef9494bee4 # 05:42 B 0 15 28 0 lockdep: Remove unnecessary acquisitions wrt workqueue flush
# extra tests with first bad commit reverted
git bisect good abbffdc6cf837978117f2d3d38eaa578b09b4eaa # 05:54 G 10 0 0 0 Revert "lockdep: Remove unnecessary acquisitions wrt workqueue flush"
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/lkp Intel Corporation
2 years, 6 months