Messages in this thread | | | Date | Sat, 13 Jun 2009 09:26:11 +0200 | From | Jens Axboe <> | Subject | Re: splice methods in character device driver |
| |
On Sat, Jun 13 2009, Leon Woestenberg wrote: > Hello Jens, > > On Mon, Jun 8, 2009 at 9:05 AM, Jens Axboe<jens.axboe@oracle.com> wrote: > > On Sat, Jun 06 2009, Leon Woestenberg wrote: > >> How can I pass information from the splice_read(), which spawns a hardware > >> DMA to the pages in my case, to the confirm() hook which is called at some > >> (random) time in the future? > > > > There's a ->private for each pipe_buffer, so you can pass along info on > > a per-page granularity. > > > So, this means in my driver's splice_read(), I must set > pipe->bufs[i]->private for each 0 <= i < PIPE_BUFFERS?
Yes. There's no way to make it bigger granularity, since you could have a mix of source pages in the pipe.
-- Jens Axboe
| |