I am wondering whether we need contiguous memory for a PHYSICAL buffer to perform the DMA I/O. It seems not, because regular buffers can be consisted of non-contiguous pages. The disk driver should treat both kinds of buffers in the same way. So can I say that any buffers used by kernel (via getblk()) is conforming DMA-able buffer?
Thanks for any clarification. -Zhihui To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
