On Thu, 7 Jun 2007, Devvrat Tripathi wrote: > I wanted to ask you if current pid will work at the driver level. i used > in pci-gart.c to get the processes which are using DMA transfer but > stragely i get 0 sometimes and sometime proper pid's. I cant figure out > the reason for this strange behaviour. Is there a better way to find out > who actually initiated the IO transfer which is using the dma_ops > functions. Can anybody please help me in this regard. zero is valid PID (belongs to idle task). The meaning of current->pid is meaningful only in process context. If the code you are looking at is running in the interrupt context, the current->pid is going to be pretty random. -- Jiri Kosina -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
