Messages in this thread | | | Date | Mon, 21 May 2001 08:47:38 -0700 | From | Jonathan Lundell <> | Subject | Re: alpha iommu fixes |
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At 6:17 PM +0400 2001-05-21, Ivan Kokshaysky wrote: >On Mon, May 21, 2001 at 06:55:29AM -0700, Jonathan Lundell wrote: >> 8 slots (and you're right, 6 is a practical upper limit, fewer for >> 66 MHz) *per bus*. Buses can proliferate like crazy, so the slot >> limit becomes largely irrelevant. > >True, but the bandwidth limit is highly relevant. That's why modern >systems have multiple root buses, not a bridged ones.
Sure, there are systems with multiple root buses (I'm a bit fuzzy on how well Linux handles that), and bandwidth is important, but it's simply wrong to assume that a particular root bus will never have more than 6 or 8 devices. There are legitimate cases (firewalls spring to mind) where port count is driven by other considerations than aggregate bandwidth. -- /Jonathan Lundell. - 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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