From: Guillaume Tucker <guillaume.tucker@collabora.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Ingo Molnar <mingo@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
kernel-build-reports@lists.linaro.org,
Matt Hart <matthew.hart@linaro.org>,
stable@vger.kernel.org
Subject: Re: stable/linux-4.14.y boot: 108 boots: 0 failed, 107 passed with 1 conflict (v4.14.11)
Date: Wed, 3 Jan 2018 09:55:45 +0000 [thread overview]
Message-ID: <ec0baa05-eeb7-7baa-7bc6-062d7f52e6ec@collabora.com> (raw)
In-Reply-To: <alpine.DEB.2.20.1801031046270.1957@nanos>
On 03/01/18 09:48, Thomas Gleixner wrote:
> On Wed, 3 Jan 2018, Guillaume Tucker wrote:
>
>> On 03/01/18 03:11, kernelci.org bot wrote:
>>> stable/linux-4.14.y boot: 108 boots: 0 failed, 107 passed with 1 conflict
>>> (v4.14.11)
>>>
>>> Full Boot Summary:
>>> https://kernelci.org/boot/all/job/stable/branch/linux-4.14.y/kernel/v4.14.11/
>>> Full Build Summary:
>>> https://kernelci.org/build/stable/branch/linux-4.14.y/kernel/v4.14.11/
>>>
>>> Tree: stable
>>> Branch: linux-4.14.y
>>> Git Describe: v4.14.11
>>> Git Commit: 0d59679df5b53755c00ea0292df696f97bfc950d
>>> Git URL:
>>> http://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
>>> Tested: 59 unique boards, 23 SoC families, 16 builds out of 185
>>>
>>> Boot Regressions Detected:
>>>
>>> x86:
>>>
>>> x86_64_defconfig:
>>> qemu:
>>> lab-mhart: new failure (last pass: v4.14.10)
>>>
>>> Conflicting Boot Failure Detected: (These likely are not failures as other
>>> labs are reporting PASS. Needs review.)
>>>
>>> x86:
>>>
>>> x86_64_defconfig:
>>> qemu:
>>> lab-mhart: FAIL
>>> lab-collabora: PASS
>>
>> Well, it turns out this is not exactly a conflict as there's a
>> subtle difference between the qemu devices in lab-mhart and in
>> lab-collabora. The ones in lab-collabora are configured to use
>> KVM, and it looks like the ones in lab-mhart aren't.
>>
>> So this job with KVM enabled passes in lab-collabora:
>>
>> https://lava.collabora.co.uk/scheduler/job/1032358
>>
>> but it fails if I tell LAVA (qemu) to disable KVM:
>>
>> https://lava.collabora.co.uk/scheduler/job/1032359
>>
>> with the same panic as in lab-mhart. It seems like it's failing
>> to return from an interrupt:
>>
>> http://lava.streamtester.net/scheduler/job/87308
>>
>> [ 2.678828] ? native_iret+0x7/0x7
>> [ 2.679208] WARNING: can't dereference iret registers at 00000000ffc66068
>> for ip page_fault+0x11/0x60
>>
>> This triggered an automated bisection on kernelci.org, please see
>> the results below.
>>
>> I may run another bisection with this config enabled earlier in
>> the history to track down the actual change in the code that
>> introduced the issue, let me know if it's worth doing.
>
> No, because before that commit not all pieces are in place.
>
> Can you please try the failing kernel with pti=off on the command line?
It does boot with pti=off (and KVM disabled):
https://lava.collabora.co.uk/scheduler/job/1032387
> I'll start a test instance here as well.
>
> Thanks,
>
> tglx
next prev parent reply other threads:[~2018-01-03 9:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <5a4c49c8.50b91c0a.2b051.322e@mx.google.com>
2018-01-03 9:44 ` stable/linux-4.14.y boot: 108 boots: 0 failed, 107 passed with 1 conflict (v4.14.11) Guillaume Tucker
2018-01-03 9:48 ` Thomas Gleixner
2018-01-03 9:55 ` Guillaume Tucker [this message]
2018-01-03 10:36 ` Thomas Gleixner
2018-01-03 11:14 ` Paolo Bonzini
2018-01-03 19:55 ` Thomas Gleixner
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