linux-kernel - [KVM] e923b0537d: kernel-selftests.kvm.rseq

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Date:   Mon, 15 Aug 2022 15:50:41 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Gavin Shan <gshan@...hat.com>
CC:     Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Andrew Jones <andrew.jones@...ux.dev>,
        LKML <linux-kernel@...r.kernel.org>, <kvm@...r.kernel.org>,
        <lkp@...ts.01.org>, <lkp@...el.com>, <xudong.hao@...el.com>,
        <regressions@...ts.linux.dev>
Subject: [KVM]  e923b0537d: kernel-selftests.kvm.rseq_test.fail


Greeting,

FYI, we noticed the following commit (built with gcc-11):

commit: e923b0537d28e15c9d31ce8b38f810b325816903 ("KVM: selftests: Fix target thread to be migrated in rseq_test")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

in testcase: kernel-selftests
version: kernel-selftests-x86_64-37f3cb9b-1_20220704
with following parameters:

	group: kvm
	ucode: 0xd000363

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: 128 threads 2 sockets Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz with 128G memory

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


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>


# selftests: kvm: rseq_test
# ==== Test Assertion Failure ====
#   rseq_test.c:278: i > (NR_TASK_MIGRATIONS / 2)
#   pid=49599 tid=49599 errno=4 - Interrupted system call
#      1	0x000000000040265d: main at rseq_test.c:278
#      2	0x00007fe44eed07fc: ?? ??:0
#      3	0x00000000004026d9: _start at ??:?
#   Only performed 23174 KVM_RUNs, task stalled too much?
# 
not ok 56 selftests: kvm: rseq_test # exit=254


#regzbot introduced: e923b0537d


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        sudo bin/lkp install job.yaml           # job file is attached in this email
        bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
        sudo bin/lkp run generated-yaml-file

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.



-- 
0-DAY CI Kernel Test Service
https://01.org/lkp



View attachment "config-5.19.0-rc6-00127-ge923b0537d28" of type "text/plain" (164131 bytes)

View attachment "job-script" of type "text/plain" (5866 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (39436 bytes)

View attachment "kernel-selftests" of type "text/plain" (237722 bytes)

View attachment "job.yaml" of type "text/plain" (4830 bytes)

View attachment "reproduce" of type "text/plain" (146 bytes)