Messages in this thread | | | From | Venkatesh Ramamurthy <> | Subject | RE: Confirmation request about new 2.4.x. kernel limits | Date | Tue, 9 Jan 2001 13:00:03 -0500 |
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> On Tue, Jan 09, 2001 at 08:27:49AM -0800, Tim Wright wrote: > > you are correct in saying that ia32 systems don't have IOMMU hardware, > but > > it's unfortunate that we don't support 64-bit PCI bus master cards, > since > > they're inexpensive and fairly common now. For instance, the Qlogic ISP > SCSI > > cards can do 64-bit addressing, as can many others. Has anybody taken a > look > > at enabling this ? [Venkatesh Ramamurthy] Our AMI RAID controller and MegaRAID driver ( part of kernel) supports full blown 64 bit and we have successfully tested with more than 4 GB RAM under IA32 (uses bounce buffer) and IA64 systems. We are seeing a dramatic performance drop on IA32 with 8GB ram as it has to do bounce buffering. I think we need this support to give our dear old linux a lead compared to other OS'es.
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