RE: Expertise required on building code for SMP

[Hannibal B]

   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@xxxxxxxxxxxxx] 
Sent: Thursday, July 13, 2006 1:16 PM
To: bhuvan.kumarmital@xxxxxxxxx
Cc: linux-usb-devel@xxxxxxxxxxxxxxxxxxxxx;
kernelnewbies-request@xxxxxxxxxxxx; kernel-mentors@xxxxxxxxxxx;
os_drivers@xxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
Subject: Re: Expertise required on building code for SMP

On Thu, 2006-07-13 at 13:12 +0530, bhuvan.kumarmital@xxxxxxxxx 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)

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel"
in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/