From: Ravi Bangoria <ravi.bangoria@amd.com>
To: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Borislav Petkov <bp@alien8.de>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
linux-perf-users@vger.kernel.org,
open list <linux-kernel@vger.kernel.org>,
regressions@lists.linux.dev, lkft-triage@lists.linaro.org,
Ravi Bangoria <ravi.bangoria@amd.com>
Subject: Re: Perf: BUG: kernel NULL pointer dereference, address: 0000000000000198
Date: Wed, 26 Oct 2022 15:35:53 +0530 [thread overview]
Message-ID: <5bec4620-2e2b-abe0-1e82-528c084d4d16@amd.com> (raw)
In-Reply-To: <d577887d-b86b-82be-8081-f7bebacd8067@amd.com>
On 25-Oct-22 6:36 PM, Ravi Bangoria wrote:
> On 25-Oct-22 9:59 AM, Ravi Bangoria wrote:
>> On 20-Oct-22 12:24 PM, Naresh Kamboju wrote:
>>> Following kernel BUG noticed while running perf testing on qemu-x86-64.
>>
>> Thanks Naresh. I'm aware of the crash[1] but haven't got a chance to
>> root cause it. Let me try to spend some time on it.
>
> I tried to mimic https://lkft.validation.linaro.org/scheduler/job/5708609.
> However, I don't see a way to download lava-guest.qcow2. So I just used
> rootfs and kernel:
>
> /usr/bin/qemu-system-x86_64 -cpu host -enable-kvm -nographic -net nic,model=virtio,macaddr=DE:AD:BE:EF:66:20 -net user -m 1024 -monitor none -kernel bzImage --append "root=/dev/sda rootwait console=ttyS0,115200" -hda lkft-console-image-intel-corei7-64-20221019172733.rootfs.ext4 -m 4096 -smp 4 -nographic
>
> And I ran perf test inside the guest, which ran fine.
Running perf test in a loop reproduced the issue after some iterations.
Thanks,
Ravi
next prev parent reply other threads:[~2022-10-26 10:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-20 6:54 Naresh Kamboju
2022-10-25 4:29 ` Ravi Bangoria
2022-10-25 13:06 ` Ravi Bangoria
2022-10-26 10:05 ` Ravi Bangoria [this message]
2022-11-03 11:45 ` Ravi Bangoria
2022-11-03 12:33 ` Peter Zijlstra
2022-11-03 16:12 ` Ravi Bangoria
2022-11-07 10:29 ` Ravi Bangoria
2022-11-14 4:40 ` [PATCH] perf/x86/amd: Fix crash due to race between amd_pmu_enable_all, perf NMI and throttling Ravi Bangoria
2022-11-16 9:21 ` [tip: perf/urgent] " tip-bot2 for Ravi Bangoria
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