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From: Mike Viau on 25 Jul 2010 00:00

> On Sat, 24 Jul 2010 22:22:29 -0500 <stan(a)hardwarefreak.com> wrote:
>
> Setting CONCURRENCY_LEVEL=4 in your user environment should fix this, at
> least, it used to. From the bash command line, for the current session only:
>
> export CONCURRENCY_LEVEL=4
>
> To make it permanent you need to edit /home/[user]/.bash_profile and append:
>
> export CONCURRENCY_LEVEL=4
>
> If you regularly do your kernel work while logged on as root, you'd need to
> append it to /root/.bashrc or /root/.profile

You might also want to read http://www.wowway.com/~zlinuxman/Kernel.htm

or from google's cache at http://webcache.googleusercontent.com/search?q=cache:7D7TfZqA1wMJ:www.wowway.com/~zlinuxman/Kernel.htm+http://www.wowway.com/~zlinuxman/Kernel.htm&cd=4&hl=en&ct=clnk&gl=ca


-M

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From: Celejar on 25 Jul 2010 00:20
On Sat, 24 Jul 2010 22:22:29 -0500
Stan Hoeppner <stan(a)hardwarefreak.com> wrote:

> Curt Howland put forth on 7/24/2010 8:49 PM:
>
> > Not compiling often (as you can tell), I note that the compile is
> > using only one cpu of 4 at a time. I'm sure there is a parallel
> > compilation tweak somewhere.
>
> Setting CONCURRENCY_LEVEL=4 in your user environment should fix this, at
> least, it used to. From the bash command line, for the current session only:
>
> export CONCURRENCY_LEVEL=4
>
> To make it permanent you need to edit /home/[user]/.bash_profile and append:
>
> export CONCURRENCY_LEVEL=4
>
> If you regularly do your kernel work while logged on as root, you'd need to
> append it to /root/.bashrc or /root/.profile

And assuming you're using kernel-package, from its manpage:

--jobs number
-j number Set the environment variable CONCURRENCY_LEVEL to "number".

Celejar
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From: Sven Joachim on 25 Jul 2010 03:30
On 2010-07-25 03:49 +0200, Curt Howland wrote:

> Not compiling often (as you can tell), I note that the compile is
> using only one cpu of 4 at a time. I'm sure there is a parallel
> compilation tweak somewhere.

Yes, the "-j" switch for make. If you want to build a Debian package
that you can install and test, use "make -j4 deb-pkg".

Sven


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From: Sven Joachim on 25 Jul 2010 03:30
On 2010-07-25 05:22 +0200, Stan Hoeppner wrote:

> Curt Howland put forth on 7/24/2010 8:49 PM:
>
>> Not compiling often (as you can tell), I note that the compile is
>> using only one cpu of 4 at a time. I'm sure there is a parallel
>> compilation tweak somewhere.
>
> Setting CONCURRENCY_LEVEL=4 in your user environment should fix this, at
> least, it used to.

This only works if you use kernel-package to build the kernel. The
generic way is to use "make -j4".

> If you regularly do your kernel work while logged on as root, you'd need to
> append it to /root/.bashrc or /root/.profile

There is no need to ever build the kernel as root.

Sven


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From: Curt Howland on 25 Jul 2010 12:50
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Sunday 25 July 2010, Sven Joachim <svenjoac(a)gmx.de> was heard to
say:
> > Setting CONCURRENCY_LEVEL=4 in your user environment should fix
> > this, at least, it used to.
>
> This only works if you use kernel-package to build the kernel.  The
> generic way is to use "make -j4".

Excellent advice to the novice.

> There is no need to ever build the kernel as root.

Strangely enough, I wasn't. Not quite _that_ novice I guess. :^)

Now on to something new: Build failure! Who'd'a thought? I changed
back to single-concurrency just to make sure that it wasn't
related, "make clean", then tried again with the same result.

Any suggestions?

==========
$ make-kpkg --revision=curt0.1 kernel_image
{scrolled so many as I'm sure you know... Then,}
make[1]: Leaving directory `/usr/src/linux-2.6.35-rc6'
/usr/bin/make -j1 ARCH=i386 \
-C Documentation/lguest
make[1]: Entering directory
`/usr/src/linux-2.6.35-rc6/Documentation/lguest'
cc -m32 -Wall -Wmissing-declarations -Wmissing-prototypes -O3 -I../../include -I../../arch/x86/include -U_FORTIFY_SOURCE
lguest.c -o lguest
lguest.c:21:25: error: sys/eventfd.h: No such file or directory
lguest.c: In function 'create_thread':
lguest.c:1026: warning: implicit declaration of function 'eventfd'
make[1]: *** [lguest] Error 1
make[1]: Leaving directory
`/usr/src/linux-2.6.35-rc6/Documentation/lguest'
make: *** [debian/stamp/build/kernel] Error 2
==========




- --
Those who torment us for our own good will torment us without end,
for they do so with the approval of their consciences.
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