Hi,
How to disable interrupts on pentium 4 (or any
i386)
machine?
I tried to include "cli" instruction in a kernel
module. But got runtime error.
Thanks in advance.
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On Thu, Nov 16, 2006 at 11:23:12AM +0000, ranjith kumar wrote:
> Hi,
> How to disable interrupts on pentium 4 (or any
> i386)
> machine?
>
> I tried to include "cli" instruction in a kernel
> module. But got runtime error.
Read Documentation/cli-sti-removal.txt.
- Heikki
ranjith kumar wrote:
> Hi,
> How to disable interrupts on pentium 4 (or any
> i386)
> machine?
>
> I tried to include "cli" instruction in a kernel
> module. But got runtime error.
UTFG and read LDD3
regards,
--
http://www.fi.muni.cz/~xslaby/ Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8 22A0 32CC 55C3 39D4 7A7E
On 11/16/06, ranjith kumar <[email protected]> wrote:
> Hi,
> How to disable interrupts on pentium 4 (or any
> i386)
> machine?
>
> I tried to include "cli" instruction in a kernel
> module. But got runtime error.
Are you doing this at the kernel level or application?
> On 11/16/06, ranjith kumar <[email protected]> wrote:
> Hi,
> How to disable interrupts on pentium 4 (or any
> i386)
> machine?
>
> I tried to include "cli" instruction in a kernel
> module. But got runtime error.
In a module, "cli" should not be an illegal opcode, but in user-mode
code it is. But, you should not be using 'cli' anywhere. Instead, you
should use a spin-lock to protect a critical section. Check the coding
in any network drivers to see how it is done.
Cheers,
Dick Johnson
Penguin : Linux version 2.6.16.24 on an i686 machine (5592.72 BogoMips).
New book: http://www.AbominableFirebug.com/
_
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