* TIMER_BH in 2.4 kernel
@ 2003-09-29 19:54 Yifan Zhu
2003-10-02 0:14 ` George Anzinger
0 siblings, 1 reply; 2+ messages in thread
From: Yifan Zhu @ 2003-09-29 19:54 UTC (permalink / raw)
To: linux-kernel
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
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: TIMER_BH in 2.4 kernel
2003-09-29 19:54 TIMER_BH in 2.4 kernel Yifan Zhu
@ 2003-10-02 0:14 ` George Anzinger
0 siblings, 0 replies; 2+ messages in thread
From: George Anzinger @ 2003-10-02 0:14 UTC (permalink / raw)
To: Yifan Zhu; +Cc: linux-kernel
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
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