Messages in this thread | | | Subject | Re: DRAM and PCI devices at same physical address | From | Matt Sexton <> | Date | 29 Jun 2004 10:31:30 -0400 |
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On Mon, 2004-06-28 at 15:27, Ross Biro wrote: > On 25 Jun 2004 17:23:00 -0400, Matt Sexton <sexton@mc.com> wrote: > > > > > Should they be appearing there at all? Does Linux make any guarantees > > when there is more physical memory than specified by "mem=" ? > > You've told linux there is only 512M of physical memory and it > believes you, so it is using the available address space for memory > mapped i/o. I know of no way to reserve memory on the command line.
Fair enough. I was just following the advice of the "Linux Device Drivers" book by Rubini & Corbet, where in the "Reserving High RAM Addresses" section of Chapter 7, they describe exactly this method of reserving memory for device drivers.
Matt
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