linux-kernel - Re: [PATCH v4 10/18] ACPI / table: Print GIC information when MADT is parsed

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Date:	Mon, 15 Sep 2014 11:01:40 -0700
From:	Olof Johansson <olof@...om.net>
To:	Grant Likely <grant.likely@...aro.org>
Cc:	Hanjun Guo <hanjun.guo@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Mark Rutland <mark.rutland@....com>,
	Will Deacon <will.deacon@....com>,
	Graeme Gregory <graeme.gregory@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	Sudeep Holla <Sudeep.Holla@....com>,
	Jon Masters <jcm@...hat.com>,
	Jason Cooper <jason@...edaemon.net>,
	Marc Zyngier <marc.zyngier@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
	Robert Richter <rric@...nel.org>,
	Lv Zheng <lv.zheng@...el.com>,
	Robert Moore <robert.moore@...el.com>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Liviu Dudau <Liviu.Dudau@....com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Charles Garcia-Tobin <Charles.Garcia-Tobin@....com>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linaro-acpi@...ts.linaro.org" <linaro-acpi@...ts.linaro.org>,
	Tomasz Nowicki <tomasz.nowicki@...aro.org>
Subject: Re: [PATCH v4 10/18] ACPI / table: Print GIC information when MADT is parsed

On Mon, Sep 15, 2014 at 10:52 AM, Grant Likely <grant.likely@...aro.org> wrote:
> On Sun, 14 Sep 2014 23:40:10 -0700, Olof Johansson <olof@...om.net> wrote:
>> On Fri, Sep 12, 2014 at 10:00:08PM +0800, Hanjun Guo wrote:
>> > When MADT is parsed, print GIC information to make the boot
>> > log look pretty.
>>
>> If you do this for prettiness, having an example output in the commit
>> message would be a nice touch.
>
> Agreed.
>
>> The question is why it's needed though? Do we really need all this verbose
>> information in dmesg when it could be found out in other ways instead?
>>
>> x86 is notoriously verbose in some of these aspects, I'm not sure it's
>> something we need to mimic here?
>
> For consistency, it does make sense to have the common x86 and ARM64
> code outputing information in the same way, so I think the patch still
> makes sense. All of them could be moved to KERN_DEBUG as a separate
> patch if we want to cull early boot output. I would split that off and
> discuss it separately.

Yeah, pr_debug() makes sense here -- in particular if you're going to
have a potentially slow serial console to print all this to at info
level.

I disagree on order though, there's no reason to hold off fixing this
and doing it as a separate patch.


-Olof
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