Hi Asutosh .. How r u doing ............ I hope below will clear .. or for more detail http://lwn.net/Articles/302043/ 1. threaded interrupt handlers Benifits: a) Reduce latency b) reduce locking between hard and soft part. 1. threaded interrupt handlers Benifits: a) Reduce latency b) reduce locking between hard and soft part. Threaded interrupt handlers reduce that work even further, so the top half would consist of a "quick check handler" that just ensures the interrupt is from the device; if so, it simply acknowledges the interrupt to the hardware and tells the kernel to wake the interrupt handler thread On Wed, Jan 25, 2012 at 10:15 AM, Asutosh Das <das.asutosh@gmail.com> wrote:

Hi I have a query regarding the difference between request_irq and request_threaded_irq. I am aware that the thread_fn_handler may sleep, allocate memory, acquire locks etc.

What context does the thread fn passed to the request_threaded_irq run in ?

TIA

-- ~/asd

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