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Old 04-05-2006, 08:24 AM   #1
asurya
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Registered: Apr 2005
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Handling of Interrupts in thread context


Hi All,
I have a doubt regarding handling of interrupts in thread context.

Say, an interrupt has occurred in a kernel thread context and the interrupt handler got executed.

Will the control of execution return back to the kernel thread soon after the execution of the interrupt handler?
Or
The interrupt handler gets executed, and if any soft irqs are pending, they are executed followed by returning the control back to the thread.

Linux Kernel Version:2.4.20-8

Regards
Surya Santosh

Last edited by asurya; 04-05-2006 at 08:27 AM.
 
Old 04-05-2006, 09:15 AM   #2
halturata
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Registered: Aug 2005
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The pending interrupts have to have a higher IRQ level than that of the kernel thread to get executed before the executions is returned to the kernel thread. But honestly, I doubt they can...
If there are interrupts with higher IRQ level that this example kernel thread they anyway get executed before it.
 
  


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