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Date:   Sun, 10 Sep 2017 21:32:13 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Jiri Kosina <jikos@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Andy Lutomirski <luto@...capital.net>, lkp@...org
Subject: [lkp-robot] [x86/mm]  f13c8e8c58:
 WARNING:at_arch/x86/mm/tlb.c:#initialize_tlbstate_and_flush


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

View attachment "config-4.13.0-04258-gf13c8e8" of type "text/plain" (109617 bytes)

View attachment "job-script" of type "text/plain" (4225 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (9336 bytes)

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