Messages in this thread | | | Date | Thu, 13 Jun 2002 02:38:56 -0700 (PDT) | Subject | Re: PCI DMA to small buffers on cache-incoherent arch | From | "David S. Miller" <> |
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From: David Brownell <david-b@pacbell.net> Date: Wed, 12 Jun 2002 22:13:17 -0700
David S. Miller wrote: > We have two problems we want to solve, the DMA alignment stuff and > using consistent memory for these small buffers. Therefore moving to > consistent memory (by whatever mechanism the USB desires to implement > this) is the way to go. Right, the alignment stuff is a correctness issue, the consistent memory issue is a performance concern. I like to think that 2.5 will have a lot less correctness issues in the USB stack, so it can start to pay more attention to performance concerns.
I want to reemphasize that by going to consistent memory we solve both problems, in particular the alignment stuff becomes a non-issue. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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