linux-kernel - Re: [PATCH RFC 0/3] x86: Intel Processor Trace Logger

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Message-ID: <55B869F8.5030404@jp.fujitsu.com>
Date:	Wed, 29 Jul 2015 14:51:52 +0900
From:	Takao Indoh <indou.takao@...fujitsu.com>
To:	<alexander.shishkin@...ux.intel.com>, <tglx@...utronix.de>,
	<mingo@...hat.com>, <hpa@...or.com>, <a.p.zijlstra@...llo.nl>,
	<acme@...nel.org>, <vgoyal@...hat.com>
CC:	<linux-kernel@...r.kernel.org>, <x86@...nel.org>
Subject: Re: [PATCH RFC 0/3] x86: Intel Processor Trace Logger

On 2015/07/29 14:44, Alexander Shishkin wrote:
> Takao Indoh <indou.takao@...fujitsu.com> writes:
> 
>> Hi all,
>>
>> This patch creates log buffer for Intel PT and enable logging at boot
>> time. When kernel panic occurs, we can get this log buffer from
>> crashdump file by kdump, and reconstruct the flow that led to the panic.
> 
> Good to see this work going forward!
> 
>> Takao Indoh (3):
>>    x86: Add Intel PT common files
>>    x86: Add Intel PT logger
>>    x86: Stop Intel PT and save its registers when panic occurs
>>
>>   arch/x86/Kconfig                          |   16 ++
>>   arch/x86/include/asm/intel_pt.h           |   84 +++++++++
>>   arch/x86/kernel/cpu/Makefile              |    3 +
>>   arch/x86/kernel/cpu/intel_pt.h            |  131 -------------
>>   arch/x86/kernel/cpu/intel_pt_cap.c        |   69 +++++++
>>   arch/x86/kernel/cpu/intel_pt_log.c        |  288 +++++++++++++++++++++++++++++
>>   arch/x86/kernel/cpu/intel_pt_perf.h       |   78 ++++++++
>>   arch/x86/kernel/cpu/perf_event_intel_pt.c |   54 +-----
>>   arch/x86/kernel/crash.c                   |    9 +
>>   9 files changed, 556 insertions(+), 176 deletions(-)
>>   create mode 100644 arch/x86/include/asm/intel_pt.h
>>   delete mode 100644 arch/x86/kernel/cpu/intel_pt.h
>>   create mode 100644 arch/x86/kernel/cpu/intel_pt_cap.c
>>   create mode 100644 arch/x86/kernel/cpu/intel_pt_log.c
>>   create mode 100644 arch/x86/kernel/cpu/intel_pt_perf.h
> 
> One note here: you want to use -M with git-format-patch so that renames
> are handled better.

Thank you, I didn't know this option. I'll do next time.

Thanks,
Takao Indoh


> 
> Regards,
> --
> Alex
> 


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