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Message-ID: <20161021030129.GG24319@yexl-desktop>
Date: Fri, 21 Oct 2016 11:01:29 +0800
From: Ye Xiaolong <xiaolong.ye@...el.com>
To: Dou Liyang <douly.fnst@...fujitsu.com>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...nel.org>,
LKML <linux-kernel@...r.kernel.org>,
Linus Torvalds <torvalds@...ux-foundation.org>, lkp@...org
Subject: Re: [lkp] [x86/acpi] dc6db24d24: BUG: unable to handle kernel paging
request at 0000116007090008
On 10/20, Dou Liyang wrote:
>Hi xiaolong,
>
>Thank you very much for report.
>
>I was just investigating the related problem in another patches.
>
>
>At 10/20/2016 09:16 AM, kernel test robot wrote:
>>
>>FYI, we noticed the following commit:
>>
>>https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>>commit dc6db24d2476cd09c0ecf2b8d80313539f737a89 ("x86/acpi: Set persistent cpuid <-> nodeid mapping when booting")
>>
>>in testcase: vm-scalability
>>with following parameters:
>>
>> runtime: 300
>> thp_enabled: never
>> thp_defrag: never
>> nr_task: 1
>> nr_pmem: 1
>> test: swap-w-rand
>> cpufreq_governor: performance
>>
>>
>>The motivation behind this suite is to exercise functions and regions of the mm/ of the Linux kernel which are of interest to us.
>>
>>
>>on test machine: 72 threads Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz with 128G memory
>>
>
>For this bug, I want to reproduce it completely.
>I hope you can give me the ACPI table about the test machine above.
Sure, I'll send it to you offlist.
Thanks,
Xiaolong
>
>Thanks,
>
> Dou.
>
>>caused below changes:
>>
>>
>>+------------------------------------------------------------------+------------+------------+
>>| | 8ad893faf2 | dc6db24d24 |
>>+------------------------------------------------------------------+------------+------------+
>>| boot_successes | 7 | 0 |
>>| boot_failures | 9 | 16 |
>>| invoked_oom-killer:gfp_mask=0x | 6 | 2 |
>>| Mem-Info | 6 | 2 |
>>| Out_of_memory:Kill_process | 6 | |
>>| page_allocation_failure:order:#,mode:#(GFP_KERNEL|__GFP_NORETRY) | 2 | |
>>| warn_alloc_failed+0x | 2 | |
>>| BUG:kernel_hang_in_test_stage | 2 | 2 |
>>| BUG:kernel_reboot-without-warning_in_test_stage | 1 | |
>>| BUG:unable_to_handle_kernel | 0 | 12 |
>>| Oops | 0 | 12 |
>>| RIP:get_partial_node | 0 | 12 |
>>| calltrace:devtmpfsd | 0 | 12 |
>>| RIP:_raw_spin_lock_irqsave | 0 | 9 |
>>| general_protection_fault:#[##]SMP | 0 | 3 |
>>| RIP:native_queued_spin_lock_slowpath | 0 | 3 |
>>| Kernel_panic-not_syncing:Hard_LOCKUP | 0 | 3 |
>>| RIP:load_balance | 0 | 2 |
>>| Kernel_panic-not_syncing:Fatal_exception_in_interrupt | 0 | 2 |
>>| WARNING:at_lib/list_debug.c:#__list_add | 0 | 1 |
>>| calltrace:_do_fork | 0 | 1 |
>>| RIP:resched_curr | 0 | 1 |
>>| Kernel_panic-not_syncing:Fatal_exception | 0 | 1 |
>>| WARNING:at_include/linux/uaccess.h:#__probe_kernel_read | 0 | 5 |
>>| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 0 | 2 |
>>+------------------------------------------------------------------+------------+------------+
>>
>>
>>
>>[ 9.531507] pci 0000:80:02.2: bridge window [mem 0x387fffd00000-0x387fffefffff 64bit pref]
>>[ 9.541378] pci_bus 0000:80: on NUMA node 2
>>[ 9.546734] ACPI: Enabled 4 GPEs in block 00 to 3F
>>[ 9.586911] BUG: unable to handle kernel paging request at 0000116007090008
>>[ 9.595109] IP: [<ffffffff811e50fc>] get_partial_node+0x2c/0x1c0
>>[ 9.602933] PGD 0
>>[ 9.605503] Oops: 0000 [#1] SMP
>>[ 9.609264] Modules linked in:
>>[ 9.613005] CPU: 24 PID: 585 Comm: kdevtmpfs Not tainted 4.8.0-rc1-00300-gdc6db24d #1
>>[ 9.622193] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS SE5C610.86B.01.01.0008.021120151325 02/11/2015
>>[ 9.634299] task: ffff880068040000 task.stack: ffff880068024000
>>[ 9.641168] RIP: 0010:[<ffffffff811e50fc>] [<ffffffff811e50fc>] get_partial_node+0x2c/0x1c0
>>[ 9.651890] RSP: 0000:ffff8800680279f0 EFLAGS: 00010006
>>[ 9.658079] RAX: 0000000000000002 RBX: 0000000000000246 RCX: 0000000002098020
>>[ 9.666308] RDX: ffff882053b9cfc0 RSI: 0000116007090000 RDI: ffff880076804dc0
>>[ 9.674535] RBP: ffff880068027a90 R08: ffff882053b9cfb0 R09: 0000000000000000
>>[ 9.682764] R10: ffff880068027c88 R11: 0000000b00000000 R12: ffff880076804dc0
>>[ 9.690994] R13: 0000000000000000 R14: ffff880076804dc0 R15: ffff882053b9cfb0
>>[ 9.699224] FS: 0000000000000000(0000) GS:ffff882053b80000(0000) knlGS:0000000000000000
>>[ 9.708701] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>[ 9.715373] CR2: 0000116007090008 CR3: 0000000001e06000 CR4: 00000000001406e0
>>[ 9.723602] Stack:
>>[ 9.726094] ffff88207ffd4080 0000000200000000 0000000000000000 0000000002281220
>>[ 9.735086] 0000000000000000 0000000000000000 ffffffff82343f68 ffff880068040000
>>[ 9.744080] ffff880068027a88 ffffffff811d9de5 ffff880068040000 ffffffff82343f70
>>[ 9.753072] Call Trace:
>>[ 9.756056] [<ffffffff811d9de5>] ? alloc_pages_current+0x95/0x140
>>[ 9.763223] [<ffffffff811e551a>] ___slab_alloc+0x28a/0x4b0
>>[ 9.769696] [<ffffffff813dd477>] ? avc_alloc_node+0x27/0x140
>>[ 9.776379] [<ffffffff813e2356>] ? selinux_inode_permission+0xc6/0x180
>>[ 9.784032] [<ffffffff811e4342>] ? new_slab+0x2d2/0x5a0
>>[ 9.790208] [<ffffffff813dd477>] ? avc_alloc_node+0x27/0x140
>>[ 9.796881] [<ffffffff811e5760>] __slab_alloc+0x20/0x40
>>[ 9.803067] [<ffffffff811e6b7f>] kmem_cache_alloc+0x17f/0x1c0
>>[ 9.809837] [<ffffffff813dd477>] avc_alloc_node+0x27/0x140
>>[ 9.816317] [<ffffffff813dd87a>] avc_compute_av+0x8a/0x1e0
>>[ 9.822801] [<ffffffff8121000a>] ? sget_userns+0x4ca/0x4e0
>>[ 9.829289] [<ffffffff813de596>] avc_has_perm+0x136/0x190
>>[ 9.835673] [<ffffffff810a4a69>] ? __might_sleep+0x49/0x80
>>[ 9.842161] [<ffffffff813e0000>] ? inode_doinit_with_dentry+0x530/0x660
>>[ 9.849901] [<ffffffff813f4c5d>] ? security_transition_sid+0x2d/0x40
>>[ 9.857351] [<ffffffff813e1379>] may_create+0xb9/0xe0
>>[ 9.863334] [<ffffffff813e13e2>] selinux_inode_mknod+0x42/0x80
>>[ 9.870201] [<ffffffff813da552>] security_inode_mknod+0x52/0x80
>>[ 9.877165] [<ffffffff812197e1>] vfs_mknod+0x131/0x1e0
>>[ 9.883255] [<ffffffff815b2e65>] handle_create+0x75/0x1e0
>>[ 9.889639] [<ffffffff8192da66>] ? __schedule+0x2e6/0x790
>>[ 9.896027] [<ffffffff815b3104>] devtmpfsd+0x134/0x180
>>[ 9.902117] [<ffffffff815b2fd0>] ? handle_create+0x1e0/0x1e0
>>[ 9.908792] [<ffffffff8109ded4>] kthread+0xd4/0xf0
>>[ 9.914503] [<ffffffff81932cbf>] ret_from_fork+0x1f/0x40
>>[ 9.920788] [<ffffffff8109de00>] ? kthread_create_on_node+0x180/0x180
>>[ 9.928335] Code: 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 f0 48 83 ec 70 48 85 f6 48 c7 44 24 20 00 00 00 00 0f 84 54 01 00 00 <48> 83 7e 08 00 0f 84 49 01 00 00 48 89 f3 49 89 fd 48 89 f7 89
>>[ 9.954843] RIP [<ffffffff811e50fc>] get_partial_node+0x2c/0x1c0
>>[ 9.962756] RSP <ffff8800680279f0>
>>[ 9.966902] CR2: 0000116007090008
>>[ 9.970871] BUG: unable to handle kernel paging request at 0000000100000048
>>[ 9.979058] IP: [<ffffffff819329b9>] _raw_spin_lock_irqsave+0x29/0x50
>>[ 9.986582] PGD 0
>>[ 9.989147] Oops: 0002 [#2] SMP
>>[ 9.992891] Modules linked in:
>>[ 9.996623] CPU: 24 PID: 585 Comm: kdevtmpfs Tainted: G D 4.8.0-rc1-00300-gdc6db24d #1
>>[ 10.007173] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS SE5C610.86B.01.01.0008.021120151325 02/11/2015
>>[ 10.019279] task: ffff880068040000 task.stack: ffff880068024000
>>[ 10.026147] RIP: 0010:[<ffffffff819329b9>] [<ffffffff819329b9>] _raw_spin_lock_irqsave+0x29/0x50
>>[ 10.036577] RSP: 0000:ffff8800680276e0 EFLAGS: 00010046
>>[ 10.042763] RAX: 0000000000000000 RBX: 0000000000000097 RCX: ffffffff81e5af08
>>[ 10.050991] RDX: 0000000000000001 RSI: ffff880068027738 RDI: 0000000100000048
>>[ 10.059221] RBP: ffff8800680276e8 R08: 0000000000000001 R09: 0000000000000001
>>[ 10.067450] R10: ffff880068027c88 R11: 000000000000048c R12: 0000000100000048
>>[ 10.075677] R13: 0000000000000008 R14: ffff880068027738 R15: 0000000000000046
>>[ 10.083906] FS: 0000000000000000(0000) GS:ffff882053b80000(0000) knlGS:0000000000000000
>>[ 10.093384] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>[ 10.100059] CR2: 0000000100000048 CR3: 0000000001e06000 CR4: 00000000001406e0
>>[ 10.108288] Stack:
>>[ 10.110780] 0000000100000000 ffff880068027718 ffffffff81575da0 ffffffff82263b00
>>[ 10.119773] ffff880068027738 0000000000000008 ffffffff8107e58f ffff880068027728
>>[ 10.128764] ffffffff81575e4f ffff880068027798 ffffffff8157726f ffff880068027790
>>[ 10.137756] Call Trace:
>>[ 10.140741] [<ffffffff81575da0>] _extract_crng+0x40/0xb0
>>[ 10.151150] [<ffffffff8107e58f>] ? print_oops_end_marker+0x3f/0x60
>>[ 10.158405] [<ffffffff81575e4f>] extract_crng+0x3f/0x50
>>[ 10.164591] [<ffffffff8157726f>] get_random_bytes+0x6f/0x1a0
>>[ 10.171268] [<ffffffff810d811a>] ? console_unlock+0x33a/0x610
>>[ 10.178048] [<ffffffff8107e58f>] print_oops_end_marker+0x3f/0x60
>>[ 10.185106] [<ffffffff8107e5cd>] oops_exit+0x1d/0x30
>>[ 10.191009] [<ffffffff8103091e>] oops_end+0x7e/0xd0
>>[ 10.196815] [<ffffffff81066592>] no_context+0x112/0x380
>>[ 10.203002] [<ffffffff81066881>] __bad_area_nosemaphore+0x81/0x1c0
>>[ 10.210257] [<ffffffff810669d4>] bad_area_nosemaphore+0x14/0x20
>>[ 10.217219] [<ffffffff81066d6c>] __do_page_fault+0xbc/0x4d0
>>[ 10.223796] [<ffffffff8146b47d>] ? list_del+0xd/0x30
>>[ 10.229690] [<ffffffff810671b0>] do_page_fault+0x30/0x80
>>[ 10.235972] [<ffffffff81933f48>] page_fault+0x28/0x30
>>[ 10.241965] [<ffffffff811e50fc>] ? get_partial_node+0x2c/0x1c0
>>[ 10.249610] [<ffffffff811d9de5>] ? alloc_pages_current+0x95/0x140
>>[ 10.256771] [<ffffffff811e551a>] ___slab_alloc+0x28a/0x4b0
>>[ 10.263249] [<ffffffff813dd477>] ? avc_alloc_node+0x27/0x140
>>[ 10.269921] [<ffffffff813e2356>] ? selinux_inode_permission+0xc6/0x180
>>[ 10.277564] [<ffffffff811e4342>] ? new_slab+0x2d2/0x5a0
>>[ 10.283749] [<ffffffff813dd477>] ? avc_alloc_node+0x27/0x140
>>[ 10.290421] [<ffffffff811e5760>] __slab_alloc+0x20/0x40
>>[ 10.296607] [<ffffffff811e6b7f>] kmem_cache_alloc+0x17f/0x1c0
>>[ 10.303379] [<ffffffff813dd477>] avc_alloc_node+0x27/0x140
>>[ 10.309848] [<ffffffff813dd87a>] avc_compute_av+0x8a/0x1e0
>>[ 10.316326] [<ffffffff8121000a>] ? sget_userns+0x4ca/0x4e0
>>[ 10.322806] [<ffffffff813de596>] avc_has_perm+0x136/0x190
>>[ 10.329184] [<ffffffff810a4a69>] ? __might_sleep+0x49/0x80
>>[ 10.335660] [<ffffffff813e0000>] ? inode_doinit_with_dentry+0x530/0x660
>>[ 10.343403] [<ffffffff813f4c5d>] ? security_transition_sid+0x2d/0x40
>>[ 10.350855] [<ffffffff813e1379>] may_create+0xb9/0xe0
>>[ 10.356849] [<ffffffff813e13e2>] selinux_inode_mknod+0x42/0x80
>>[ 10.363716] [<ffffffff813da552>] security_inode_mknod+0x52/0x80
>>[ 10.370680] [<ffffffff812197e1>] vfs_mknod+0x131/0x1e0
>>[ 10.376770] [<ffffffff815b2e65>] handle_create+0x75/0x1e0
>>[ 10.383151] [<ffffffff8192da66>] ? __schedule+0x2e6/0x790
>>[ 10.389533] [<ffffffff815b3104>] devtmpfsd+0x134/0x180
>>[ 10.395622] [<ffffffff815b2fd0>] ? handle_create+0x1e0/0x1e0
>>[ 10.402299] [<ffffffff8109ded4>] kthread+0xd4/0xf0
>>[ 10.408001] [<ffffffff81932cbf>] ret_from_fork+0x1f/0x40
>>[ 10.414284] [<ffffffff8109de00>] ? kthread_create_on_node+0x180/0x180
>>[ 10.421829] Code: 00 00 0f 1f 44 00 00 55 48 89 e5 53 9c 58 0f 1f 44 00 00 48 89 c3 fa 66 0f 1f 44 00 00 65 ff 05 9e a8 6d 7e 31 c0 ba 01 00 00 00 <f0> 0f b1 17 85 c0 75 06 48 89 d8 5b 5d c3 89 c6 e8 22 74 79 ff
>>[ 10.448339] RIP [<ffffffff819329b9>] _raw_spin_lock_irqsave+0x29/0x50
>>[ 10.455959] RSP <ffff8800680276e0>
>>[ 10.460101] CR2: 0000000100000048
>>[ 10.464058] BUG: unable to handle kernel paging request at 0000000100000048
>>[ 10.472244] IP: [<ffffffff819329b9>] _raw_spin_lock_irqsave+0x29/0x50
>>[ 10.479768] PGD 0
>>[ 10.482332] Oops: 0002 [#3] SMP
>>[ 10.486089] Modules linked in:
>>[ 10.489822] CPU: 24 PID: 585 Comm: kdevtmpfs Tainted: G D 4.8.0-rc1-00300-gdc6db24d #1
>>[ 10.500366] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS SE5C610.86B.01.01.0008.021120151325 02/11/2015
>>[ 10.512467] task: ffff880068040000 task.stack: ffff880068024000
>>[ 10.519334] RIP: 0010:[<ffffffff819329b9>] [<ffffffff819329b9>] _raw_spin_lock_irqsave+0x29/0x50
>>[ 10.529765] RSP: 0000:ffff8800680273d0 EFLAGS: 00010046
>>[ 10.535952] RAX: 0000000000000000 RBX: 0000000000000097 RCX: ffffffff81e5af08
>>[ 10.544183] RDX: 0000000000000001 RSI: ffff880068027428 RDI: 0000000100000048
>>[ 10.552410] RBP: ffff8800680273d8 R08: 0000000000000001 R09: 0000000000000001
>>[ 10.560641] R10: ffff880068027c88 R11: 00000000000004d1 R12: 0000000100000048
>>[ 10.568869] R13: 0000000000000008 R14: ffff880068027428 R15: 0000000000000046
>>[ 10.577097] FS: 0000000000000000(0000) GS:ffff882053b80000(0000) knlGS:0000000000000000
>>[ 10.586578] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>>[ 10.593250] CR2: 0000000100000048 CR3: 0000000001e06000 CR4: 00000000001406e0
>>[ 10.601479] Stack:
>>[ 10.603969] 0000000100000000 ffff880068027408 ffffffff81575da0 ffffffff82263b00
>>[ 10.612968] ffff880068027428 0000000000000008 ffffffff8107e58f ffff880068027418
>>[ 10.621966] ffffffff81575e4f ffff880068027488 ffffffff8157726f ffff880068027480
>>[ 10.630963] Call Trace:
>>[ 10.633942] [<ffffffff81575da0>] _extract_crng+0x40/0xb0
>>[ 10.640228] [<ffffffff8107e58f>] ? print_oops_end_marker+0x3f/0x60
>>[ 10.647484] [<ffffffff81575e4f>] extract_crng+0x3f/0x50
>>[ 10.653670] [<ffffffff8157726f>] get_random_bytes+0x6f/0x1a0
>>[ 10.660342] [<ffffffff810d811a>] ? console_unlock+0x33a/0x610
>>[ 10.667113] [<ffffffff8107e58f>] print_oops_end_marker+0x3f/0x60
>>[ 10.674173] [<ffffffff8107e5cd>] oops_exit+0x1d/0x30
>>[ 10.680069] [<ffffffff8103091e>] oops_end+0x7e/0xd0
>>[ 10.685868] [<ffffffff81066592>] no_context+0x112/0x380
>>[ 10.692059] [<ffffffff81457b18>] ? put_dec+0x18/0xa0
>>[ 10.697962] [<ffffffff81066881>] __bad_area_nosemaphore+0x81/0x1c0
>>[ 10.705218] [<ffffffff810669d4>] bad_area_nosemaphore+0x14/0x20
>>[ 10.712183] [<ffffffff81066d6c>] __do_page_fault+0xbc/0x4d0
>>[ 10.718756] [<ffffffff810671b0>] do_page_fault+0x30/0x80
>>[ 10.725040] [<ffffffff8109f061>] ? atomic_notifier_call_chain+0x21/0x30
>>[ 10.732783] [<ffffffff81933f48>] page_fault+0x28/0x30
>>[ 10.738777] [<ffffffff819329b9>] ? _raw_spin_lock_irqsave+0x29/0x50
>>[ 10.746132] [<ffffffff81575da0>] _extract_crng+0x40/0xb0
>>[ 10.752415] [<ffffffff8107e58f>] ? print_oops_end_marker+0x3f/0x60
>>[ 10.759671] [<ffffffff81575e4f>] extract_crng+0x3f/0x50
>>[ 10.765856] [<ffffffff8157726f>] get_random_bytes+0x6f/0x1a0
>>[ 10.772530] [<ffffffff810d811a>] ? console_unlock+0x33a/0x610
>>[ 10.779301] [<ffffffff8107e58f>] print_oops_end_marker+0x3f/0x60
>>[ 10.786364] [<ffffffff8107e5cd>] oops_exit+0x1d/0x30
>>[ 10.792257] [<ffffffff8103091e>] oops_end+0x7e/0xd0
>>[ 10.798057] [<ffffffff81066592>] no_context+0x112/0x380
>>[ 10.804244] [<ffffffff81066881>] __bad_area_nosemaphore+0x81/0x1c0
>>[ 10.811498] [<ffffffff810669d4>] bad_area_nosemaphore+0x14/0x20
>>[ 10.818463] [<ffffffff81066d6c>] __do_page_fault+0xbc/0x4d0
>>[ 10.825037] [<ffffffff8146b47d>] ? list_del+0xd/0x30
>>[ 10.830933] [<ffffffff810671b0>] do_page_fault+0x30/0x80
>>[ 10.837216] [<ffffffff81933f48>] page_fault+0x28/0x30
>>[ 10.843208] [<ffffffff811e50fc>] ? get_partial_node+0x2c/0x1c0
>>[ 10.850855] [<ffffffff811d9de5>] ? alloc_pages_current+0x95/0x140
>>[ 10.858015] [<ffffffff811e551a>] ___slab_alloc+0x28a/0x4b0
>>[ 10.864491] [<ffffffff813dd477>] ? avc_alloc_node+0x27/0x140
>>[ 10.871163] [<ffffffff813e2356>] ? selinux_inode_permission+0xc6/0x180
>>[ 10.878809] [<ffffffff811e4342>] ? new_slab+0x2d2/0x5a0
>>[ 10.884995] [<ffffffff813dd477>] ? avc_alloc_node+0x27/0x140
>>[ 10.891667] [<ffffffff811e5760>] __slab_alloc+0x20/0x40
>>[ 10.897853] [<ffffffff811e6b7f>] kmem_cache_alloc+0x17f/0x1c0
>>[ 10.904623] [<ffffffff813dd477>] avc_alloc_node+0x27/0x140
>>[ 10.911103] [<ffffffff813dd87a>] avc_compute_av+0x8a/0x1e0
>>[ 10.917582] [<ffffffff8121000a>] ? sget_userns+0x4ca/0x4e0
>>[ 10.924061] [<ffffffff813de596>] avc_has_perm+0x136/0x190
>>[ 10.930443] [<ffffffff810a4a69>] ? __might_sleep+0x49/0x80
>>[ 10.936924] [<ffffffff813e0000>] ? inode_doinit_with_dentry+0x530/0x660
>>[ 10.944666] [<ffffffff813f4c5d>] ? security_transition_sid+0x2d/0x40
>>[ 10.952120] [<ffffffff813e1379>] may_create+0xb9/0xe0
>>[ 10.958112] [<ffffffff813e13e2>] selinux_inode_mknod+0x42/0x80
>>[ 10.964979] [<ffffffff813da552>] security_inode_mknod+0x52/0x80
>>[ 10.971944] [<ffffffff812197e1>] vfs_mknod+0x131/0x1e0
>>[ 10.978033] [<ffffffff815b2e65>] handle_create+0x75/0x1e0
>>
>>
>>To reproduce:
>>
>> git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
>> cd lkp-tests
>> bin/lkp install job.yaml # job file is attached in this email
>> bin/lkp run job.yaml
>>
>>
>>
>>Thanks,
>>Xiaolong
>>
>>
>
>
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