Messages in this thread | | | Date | Mon, 30 Oct 2000 16:51:49 -0500 | From | Jeff Garzik <> | Subject | Re: [PATCH] kiobuf/rawio fixes for 2.4.0-test10-pre6 |
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Christoph Hellwig wrote: > > On Mon, Oct 30, 2000 at 03:08:31PM -0500, Jeff Garzik wrote: > > Actually, I wonder if its even possible for mmap_kiobuf to support audio > > -- full duplex requires that both record and playback buffer(s), > > theoretically two separate sets of kiobufs, to be presented as one space > > (with playback always presented before record). > > kvmaps take kiovecs, which are multiple kiobufs ...
s/sets of kiobufs/kiovecs/ in my message and re-read :)
<thinks> Ok kiobuf mmap in OSS audio is possible, but at that point using kiobufs is still 100% overhead, because you still have to allocate and manage DMA buffers separately due to read(2) and write(2).
-- Jeff Garzik | "Mind if I drive?" -Sam Building 1024 | "Not if you don't mind me clawing at the MandrakeSoft | dash and shrieking like a cheerleader." | -Max - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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