linux-kernel - [lkp-robot] [kvm] d5edb7f8e7: kernel_selftests.kvm.vmx_tsc_adjust

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Date:   Wed, 18 Apr 2018 09:09:29 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp-robot] [kvm]  d5edb7f8e7:
 kernel_selftests.kvm.vmx_tsc_adjust_test.fail


FYI, we noticed the following commit (built with gcc-7):

commit: d5edb7f8e7ab9fd5fd54a77d957b1733f117a813 ("kvm: selftests: add vmx_tsc_adjust_test")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

in testcase: kernel_selftests
with following parameters:

	group: kselftests-01

test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel.
test-url: https://www.kernel.org/doc/Documentation/kselftest.txt


on test machine: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 4G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):




selftests: vmx_tsc_adjust_test
========================================
==== Test Assertion Failure ====
  lib/kvm_util.c:422: kvm_fd >= 0
  pid=9812 tid=9812
     1	0x000000000040174a: kvm_get_supported_cpuid at kvm_util.c:421
     2	0x0000000000401b5a: kvm_get_supported_cpuid at kvm_util.c:461
     3	 (inlined by) kvm_get_supported_cpuid_index at kvm_util.c:449
     4	0x0000000000400e58: kvm_get_supported_cpuid_entry at kvm_util.h:125
     5	 (inlined by) main at vmx_tsc_adjust_test.c:189
     6	0x00007f2ef6225a86: ?? ??:0
     7	0x00000000004010a9: _start at ??:?
  open /dev/kvm failed, rc: -1 errno: 2
not ok 1..3 selftests:  vmx_tsc_adjust_test [FAIL]
make: Leaving directory '/usr/src/linux-selftests-x86_64-rhel-7.2-d5edb7f8e7ab9fd5fd54a77d957b1733f117a813/tools/testing/selftests/kvm'


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-4.16.0-rc4-00203-gd5edb7f" of type "text/plain" (166026 bytes)

View attachment "job-script" of type "text/plain" (5831 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (37356 bytes)

View attachment "kernel_selftests" of type "text/plain" (52992 bytes)