Re: regarding do_irq

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Hi Sri,

On Wed, Sep 8, 2010 at 9:14 AM, Sri Ram Vemulpali
<sri.ram.gmu06@xxxxxxxxx> wrote:
> Hi All,
>   Can anyone help me to understand what "exit_idle()" function does.

The kernel has the notion of "going idle". This happens whenever there
is nothing to do. The kernel will enter idle mode, and when some
interrupt occurs, then idle mode is exiting. exit_idle allows for this
to happen.

Take a look at Documentation/timers/highres.txt. It takes advantage of
being able to know when the kernel enters and exits idle mode.

-- 
Dave Hylands
Shuswap, BC, Canada
http://www.DaveHylands.com/

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