Re: locking user space memory in kernel

[Manfred Spraul]

Arjan wrote:

> On Sun, 2004-03-21 at 12:18, Eli Cohen wrote:
> > Hi,
> > I need to be able to lock memory allocated in user space and passed to 
> > my driver, in order to pass it to a dma controller that can maintain a 
> > translation table for each process. The obvious thing is to use 
>
> the linux way is to do it the other way around, provide a device that
> userspace then can mmap......
That's definitively the preferred method, but unfortunately there are 
existing apis that are the other way around. I think the main MPI 
transfer functions must read/write to arbitrary addresses, I'm sure 
there are other examples.

--
   Manfred

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