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SubjectRE: Confirmation request about new 2.4.x. kernel limits
Date
> 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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