Re: mapping physical memory

[Pauline Middelink]

On Fri, 26 Jan 2001 around 05:39:38 -0500, Dan Maas wrote:
> > I need to be able to obtain and pin approximately 8 MB of
> > contiguous physical memory in user space.  How would I go
> > about doing that under Linux if it is at all possible?
> 
> The only way to allocate that much *physically* contiguous memory is by
> writing a driver that grabs it at boot-time (I think the "bootmem" API is
> used for this). This is an extreme measure and should rarely be necessary,
> except in special cases such as primitive PCI cards that lack support for
> scatter/gather DMA.

Or is you want to reuse that memory between apps, use the bigphysarea
patch. Yes, its available for 2.4.0 now :)

    Met vriendelijke groet,
        Pauline Middelink
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