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Re: [Xen-devel] Enhancing Xen's Kconfig infrastructure to support tailored solutions
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, Lars Kurth <lars.kurth.xen@xxxxxxxxx>
- From: George Dunlap <george.dunlap@xxxxxxxxxx>
- Date: Mon, 18 Feb 2019 12:16:05 +0000
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- Cc: James McKenzie <james.mckenzie@xxxxxxxxxxx>, robin.randhawa@xxxxxxx, 'Jan Beulich' <JBeulich@xxxxxxxx>, Daniel Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Doug Goldstein <cardoe@xxxxxxxxxx>, Christopher Clark <christopher.w.clark@xxxxxxxxx>, Marek Marczykowski <marmarek@xxxxxxxxxxxxxxxxxxxxxx>, "Daniel P.Smith" <dpsmith.dev@xxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, committers@xxxxxxxxxxxxxx, Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>, Jun Nakajima <jun.nakajima@xxxxxxxxx>, Stewart Hildebrand <Stewart.Hildebrand@xxxxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxx>, Paul Durrant <paul.durrant@xxxxxxxxxx>
- Delivery-date: Mon, 18 Feb 2019 12:16:19 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 2/18/19 12:11 PM, George Dunlap wrote:
> On 2/18/19 12:01 PM, Andrew Cooper wrote:
>> On 18/02/2019 11:57, Wei Liu wrote:
>>> On Mon, Feb 18, 2019 at 11:53:15AM +0000, Lars Kurth wrote:
>>>>
>>>>> On 18 Feb 2019, at 11:30, George Dunlap <george.dunlap@xxxxxxxxxx> wrote:
>>>>>
>>>>> On 2/18/19 11:23 AM, Wei Liu wrote:
>>>>>> On Mon, Feb 18, 2019 at 11:17:56AM +0000, Lars Kurth wrote:
>>>>>>> Thank you Wei. It's interesting though that the full vs HVM only is
>>>>>>> almost identical in terms of SLOC's
>>>>>>> Lars
>>>>>> The cloc target counts the files in the dependency graph generated by
>>>>>> make.
>>>> Do we know for sure that CLOC counts everything in a file or does it
>>>> honour the pre-processor settings?
>>> We certainly don't feed any preprocessor defines to it. I doubt it
>>> understand C to that level of details anyway.
>>
>> LoC isn't a fantastic metric under any circumstance.
>>
>> Bigger code is definitely better, if the reason it is bigger is because
>> it is because it is formatted for readability/clarity etc.
>>
>> Attempting to optimise for smaller LoC, other than making entire
>> functional areas optional, is usually short sighted.
>
> For instance, we could probably decrease the LoC by nearly 20k by
> changing the style not to give the opening bracket its own line:
>
> $ find . -name '*.c' | xargs grep '^[[:space:]]*{' | wc -l
> 19896
> $ find . -name '*.[ch]' | xargs grep '^[[:space:]]*{' | wc -l
> 21847
This is hypervisor only BTW (run from xen.git/xen).
It is a bit mind-boggling to think that there are more open brackets in
the Xen code base than there is PV-specific code. O_o
-George
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