Re: [PATCH v2 2/2] arm: rename tiny64.conf to tiny64_defconfig

From: Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>
To: Julien Grall <julien.grall@arm.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>,
	Wei Liu <wei.liu2@citrix.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	George Dunlap <George.Dunlap@eu.citrix.com>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Ian Jackson <ian.jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>,
	"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
	Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>
Subject: Re: [PATCH v2 2/2] arm: rename tiny64.conf to tiny64_defconfig
Date: Mon, 20 May 2019 13:41:03 +0000	[thread overview]
Message-ID: <87a7fh8cr4.fsf@epam.com> (raw)
In-Reply-To: <1ca603c5-2e97-9529-963a-f381b04c727f@arm.com>

Hi Julien,

Julien Grall writes:

> Hi,
>
> First of all, please add a cover letter when you send a series. This
> help for threading and also a place to commend on general feedback.
Oh, okay. That was quite simple change and I didn't wanted to spam with
extra emails. I will include cover letter next time.

> Furthermore, please use scripts/{add, get}_maintainers.pl to find the
> correct maintainers. While I agree that CCing REST is a good idea, you
> haven't CCed all of them.
Problem is that I used this script:

$ ./scripts/get_maintainer.pl -f defconfig_v2/v2-0002-arm-rename-tiny64.conf-to-tiny64_defconfig.patch
Andrew Cooper <andrew.cooper3@citrix.com>
George Dunlap <George.Dunlap@eu.citrix.com>
Ian Jackson <ian.jackson@eu.citrix.com>
Jan Beulich <jbeulich@suse.com>
Julien Grall <julien.grall@arm.com>
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Stefano Stabellini <sstabellini@kernel.org>
Tim Deegan <tim@xen.org>
Wei Liu <wei.liu2@citrix.com>
xen-devel@lists.xenproject.org

I was quite surprised by result myself. Honestly, I wanted to CC only
you and Stefano, but decided to play by the rules.

Also, add_maintainers.pl just ignores this patch at all:

% scripts/add_maintainers.pl -v 2 -d defconfig_v2
Processing: v2-0001-makefile-add-support-for-_defconfig-targets.patch
Processing: v2-0002-arm-rename-tiny64.conf-to-tiny64_defconfig.patch
./scripts/get_maintainer.pl: file 'defconfig_v2/v2-0002-arm-rename-tiny64.conf-to-tiny64_defconfig.patch' doesn't appear to be a patch.  Add -f to options?

>
> On 16/05/2019 14:37, Volodymyr Babchuk wrote:
>> As build system now supports *_defconfig rules it is good to be able
>> to configure minimal XEN image with
>
> I am afraid this is not correct. tiny64 will not be able to generate a
> minimal config to boot on any platform supported by Xen.
>
> It is meant to be used as a base for tailoring your platform where all
> the options are turned off by default.
>
> So I think offering a direct access is likely going to be misused in
> most of the cases without proper documentation.

In the original commit message Stefano suggested to use olddefconfig:

"   Add a tiny kconfig configuration. Enabled only the credit scheduler.
    It only carries non-default options (use make menuconfig or make
    olddefconfig to produce a complete .config file). "

I don't see any significant difference between

# cp tiny64.conf .config && make olddefconfig

and

# make tiny64_defconfig

Anyways, it is up to you to accept or decline this particular patch. I
mostly interested in the first patch in the series, because our build
system depends on it. This very patch I sent out only because I wanted
to tidy up things a bit. But if you are saying that it is intended to
store minimal config in this way, I'm okay with it.

--
Best regards,Volodymyr Babchuk
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