CONFIG_PREEMPT for Feisty?

Flavio Martins xhaker at gmail.com
Fri Dec 1 17:14:34 GMT 2006


There are PREEMPT enable kernel images in feisty repositories.
The metapackage is linux-image-lowlatency.

Have fun,
Flavio Martins
On 12/1/06, John Richard Moser <nigelenki at comcast.net> wrote:
>
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> Is CONFIG_PREEMPT ready for Feisty, or vice versa?
>
> CONFIG_PREEMPT allows the kernel to achieve millisecond-level latencies
> by preemping in kernel mode.  Currently Edgy and Feisty both use
> CONFIG_PREEMPT_VOLUNTARY.  Voluntary Preempt allows a high priority
> process to be preempted by a lower priority one in certain cases, but
> doesn't make the kernel preemptable.
>
> Soon Ingo's real-time patches should be ready for mainline, which means
> the choices will be between no preemption; low latencies (voluntary);
> millisecond (preempt); and microsecond (real-time).  Ideally it would be
> possible to switch between these via a boot parameter but I suspect that
> would be difficult to get exactly right.
>
>
> - --
>     We will enslave their women, eat their children and rape their
>     cattle!
>                   -- Bosc, Evil alien overlord from the fifth dimension
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