RE: Expertise required on building code for SMP

["Hannibal B" <bhannibal@ipolicynetworks.com>]

   Bottom half of your driver code is the were you can take advantage of
the SMP feature.You can use either workqueue(which is a simpler
interface which will create number threads based on the cpu count ),but
if U want finer control you can use Kthread(which does'nt inherits
parents sigmask and VM) or kernel_thread, depending on your need.


-----Original Message-----
From: Arjan van de Ven [mailto:arjan@infradead.org] 
Sent: Thursday, July 13, 2006 1:16 PM
To: bhuvan.kumarmital@wipro.com
Cc: linux-usb-devel@lists.sourceforge.net;
kernelnewbies-request@nl.linux.org; kernel-mentors@selenic.com;
os_drivers@osdl.org; linux-kernel@vger.kernel.org
Subject: Re: Expertise required on building code for SMP

On Thu, 2006-07-13 at 13:12 +0530, bhuvan.kumarmital@wipro.com wrote:
> We've written a device driver in linux for a pcmcia card with usb and
> serial functionality. I need to test this driver on a dual core/SMP
> machine. We work on kernel 2.6.15.4. I have recompiled this kernel
> version on my dual core machine with the CONFIG_SMP flag set during
> menuconfig.
> 
> How do i ensure that my driver is making use of the SMP feature? Do
> build my driver code i have a makefile in which i use the
EXTRA_CFLAGS=
> -D__SMP__ -DCONFIG_SMP -DLINUX.

NO!

You should just use a normal KBuild makefile, and not ever add any extra
cflags....

(but you failed to provide a URL to even your Makefile but also to your
code so it's hard to give you a detailed recommendation)

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