TIMER_BH in 2.4 kernel

TIMER_BH in 2.4 kernel

[Yifan Zhu]

Hi,
I'm looking at the 2.4 kernel. My understanding of the code is that the
TIMER_BH handler is executed when the hardware timer interrupt returns (
after do_IRQ(), but before returning to the interrupted task ). Is that
right?

Thanks for clarification!

Yifan

Re: TIMER_BH in 2.4 kernel

[George Anzinger]

Yifan Zhu wrote:
> Hi,
> I'm looking at the 2.4 kernel. My understanding of the code is that the
> TIMER_BH handler is executed when the hardware timer interrupt returns (
> after do_IRQ(), but before returning to the interrupted task ). Is that
> right?
> 
> Thanks for clarification!

Unless there is a bh_lock in effect at the time, in which case it is 
executed when the lock is released.

-
-- 
George Anzinger   george@mvista.com
High-res-timers:  http://sourceforge.net/projects/high-res-timers/
Preemption patch: http://www.kernel.org/pub/linux/kernel/people/rml