Re: Re request_threaded_irq

On Wed, Jan 25, 2012 at 5:45 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

It runs in process context not in interrupt context. It is a normal kernel thread. That is why as you said it can sleep (since it can be schedule again), can allocate any time of memory (even if this operations leads to a sleep) and acquire locks (which also makes the process sleep if it fails to do it). Best regards, -- Javier Martínez Canillas (+34) 682 39 81 69 Barcelona, Spain