linux-kernel - Re: Hardware dependencies in Kconfig

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Date:	Tue, 15 Apr 2014 10:36:50 -0700
From:	Randy Dunlap <rdunlap@...radead.org>
To:	Jean Delvare <jdelvare@...e.de>,
	Greg KH <gregkh@...uxfoundation.org>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Marek <mmarek@...e.cz>,
	Josh Boyer <jwboyer@...oraproject.org>
Subject: Re: Hardware dependencies in Kconfig

On 04/15/2014 03:54 AM, Jean Delvare wrote:
> Hi Greg,
> 
> On Mon, 14 Apr 2014 21:52:14 -0700, Greg KH wrote:
>> On Mon, Apr 14, 2014 at 11:12:54PM +0200, Jean Delvare wrote:
> 
>> I do 'allmodconfig'
>> builds all the time, with over 3000 modules.  The build works just fine
>> on "modern" hardware.
> 
>> I'd argue that your build systems need to get faster, the laptop I'm
>> typing this on can do a full modconfig build, with over 3000 modules, in
>> around 20 minutes.  My build server in the cloud can do that in less
>> than 5 minutes, and that's not a very fast machine these days.
> 
> Electricity isn't free, hardware isn't free, rack slot count is finite
> and server room space is limited over here.
> 
> I don't quite see why we should invest in new hardware to shorten the
> build times, if the same can be achieved with our current hardware
> simply with better configuration files. Plus there is no reason to
> choose between the two. We can have new hardware _and_ better configs
> and improve the build times further :-) So your proposal is off-topic
> to some degree.
> 
> And really, I don't see why I should have to wait for 10 minutes for my
> build to complete if half of that is spent building drivers that will
> never be used. The fact that 10 minutes is "reasonable" is irrelevant.
> 
> Of course, if the Linux Foundation, or you personally, are willing to
> buy me a brand new workstation with more CPU power than I currently
> have, I'll gladly accept. You can also donate your powerful laptop to
> the OBS project, they'll be happy to add it to their build farm ;-)

hey, over here also...
I'd like a new fast laptop that does decent allmodconfig build times.  :)
[e.g., a core i7 cpu and ssd and lots of RAM]

-- 
~Randy
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