linux-kernel - Re: [x86/time] 03fa63cc96: ACPI_Error:Table[DMAR]is_not_invalidated_during_early_boot

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Date:   Fri, 7 Jul 2017 10:39:10 +0800
From:   Dou Liyang <douly.fnst@...fujitsu.com>
To:     Ye Xiaolong <xiaolong.ye@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>
CC:     <x86@...nel.org>, <linux-kernel@...r.kernel.org>,
        <xen-devel@...ts.xenproject.org>, <mingo@...nel.org>,
        <hpa@...or.com>, <ebiederm@...ssion.com>, <bhe@...hat.com>,
        <boris.ostrovsky@...cle.com>, <peterz@...radead.org>,
        <izumi.taku@...fujitsu.com>, <lkp@...org>
Subject: Re: [x86/time] 03fa63cc96:
 ACPI_Error:Table[DMAR]is_not_invalidated_during_early_boot_stage(#/tbxface
 -#)

Hi xiaolong,

Really thanks for your testing.

At 07/07/2017 09:54 AM, Ye Xiaolong wrote:
> On 07/06, Thomas Gleixner wrote:
>> On Thu, 6 Jul 2017, kernel test robot wrote:
>>
>>> commit: 03fa63cc96ab35592e0a7d522b8edbc1e6b02d22 ("x86/time: Initialize interrupt mode behind timer init")
>>
>>> +----------------+------------+------------+
>>> |                | 43436935b7 | 03fa63cc96 |
>>> +----------------+------------+------------+
>>> | boot_successes | 0          | 4          |
>>> +----------------+------------+------------+
>>
>> So 03fa63cc96 makes the box boot again. I'm confused as usual by the
>> output of this tool.,
>>
>>> kern  :info  : [    0.005000] tsc: Fast TSC calibration using PIT
>>> kern  :info  : [    0.006000] tsc: Detected 2195.020 MHz processor
>>> kern  :info  : [    0.007000] Calibrating delay loop (skipped), value calculated using timer frequency.. 4390.04 BogoMIPS (lpj=2195020)
>>> kern  :info  : [    0.008001] pid_max: default: 90112 minimum: 704
>>> kern  :info  : [    0.009037] ACPI: Core revision 20170303
>>> kern  :err   : [    0.010002] ACPI Error: Table [DMAR] is not invalidated during early boot stage (20170303/tbxface-193)
>>
>> Sure we have a error message here, but compared to what? Compared to
>> something which does not boot at all?
>
> Sorry for the confusion, here commit 43436935b7 boot failed due to OOM which
> happened at the late stage of kernel boot while the ACPI error showed at the
> early boot stage for commit 03fa63cc96 and it didn't appear in 43436935b7's
> dmesg.
>

let's make the problem clearly firstly:

1) Commit 43436935b7 ("x86/xen: Bypass intr mode setup in enlighten_pv
system") made kernel boot failed, which caused by OOM.

2) Commit 03fa63cc96 ("x86/time: Initialize interrupt mode behind timer 
init") can make the kernel boot success again, but with an ACPI error 
happened.

And both *1* and *2* used the same configuration showed in the
attachment.

Does anything I missed?

Thanks,

	dou.

> Thanks,
> Xiaolong
>
>>
>> Thanks,
>>
>> 	tglx
>>
>
>
>