linux-kernel - Re: Compile kernel for various times and problem of too long time consuming

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Date:	Mon, 8 Aug 2011 09:48:05 +0000 (UTC)
From:	WANG Cong <xiyou.wangcong@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	kernelnewbies@...nelnewbies.org
Subject: Re: Compile kernel for various times and problem of too long time
 consuming

On Sun, 07 Aug 2011 21:39:12 +0430, Amirali Shambayati wrote:

> Hi all,
> Since I want to evaluate performance improvements by changing just one
> file in kernel(noop-iosched) and compiling kernel is too much
> time-consuming, I want to know that if I compile kernel for more than
> one time, does it take similar time to first time?
> 
> I use following commands. If I don't use "make-kpkg clean" for next
> times, does it just compile the files which have been modified or it
> compile whole kernel package again?
> 
> make-kpkg clean
> fakeroot make-kpkg --initrd --append-to-version=-some-string-here
> kernel-image kernel-headers

Don't run 'make-kpkg clean', and try to use ccache,
make CC='ccache gcc'

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