regarding kernel preemption

regarding kernel preemption

[Rick Brown]

Hi list,

I had posted this on kernelnewbies, but did not get much response, and
hence trying here.

When we preempt_enable() / preempt_disable(), is the kernel preemption
enabled or disabled for ALL the processors or just the local
processor?

TIA,

Rick

Re: regarding kernel preemption

[Scott Wood]

On Thu, Mar 29, 2007 at 09:35:13PM +0530, Rick Brown wrote:
> When we preempt_enable() / preempt_disable(), is the kernel preemption
> enabled or disabled for ALL the processors or just the local
> processor?

Just the local processor.

-Scott

Re: regarding kernel preemption

[Rodrigo Rubira Branco]

[-- Attachment #1: Type: text/plain, Size: 942 bytes --]

I recommend this link for more info:
http://www.linuxjournal.com/comment/reply/5600

Sent me a mail if you need any other explanation into this.

Cya,


Rodrigo (BSDaemon).

On Thu, 2007-03-29 at 11:21 -0500, Scott Wood wrote:
> On Thu, Mar 29, 2007 at 09:35:13PM +0530, Rick Brown wrote:
> > When we preempt_enable() / preempt_disable(), is the kernel preemption
> > enabled or disabled for ALL the processors or just the local
> > processor?
> 
> Just the local processor.
> 
> -Scott
> -
> To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.linux-learn.org/faqs
-- 
Rodrigo Rubira Branco
Software Engineering - Advanced Linux Response Team (ALRT)
IBM Linux Technology Center (IBM/LTC)
rrbranco@br.ibm.com

GPG KeyID: 5E90CA19

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 189 bytes --]