Date: Thu, 29 Nov 2001 15:18:53 -0500 (EST) From: Zhihui Zhang <zzhang@cs.binghamton.edu> To: freebsd-hackers@freebsd.org Subject: contiguous memory of a buffer Message-ID: <Pine.SOL.4.21.0111291508440.4208-100000@onyx>
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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 majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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