On Wed, Jan 25, 2012 at 5:45 AM, Asutosh Das <das.asutosh@xxxxxxxxx> 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 _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
