Re: Sawmill's dataspaces and the Hurd's physmem

[Neal H. Walfield]

At Wed, 19 Oct 2005 11:33:49 +0800,
yuan Darwin-r62832 wrote:
> > Physical memory management needn't be an all or nothing deal. Certainly, an 
> > application might wish to completely 
> > manage the paging policy and its address space layout, however, I tend to 
> > think that this is the exception.  And as 
> > we will provide a POSIX personality, we need to have some sort of default 
> > VM manager.
> 
> About general VM manager, what I really mean is just the "default VM
> manager".  However, the question is still there: now that those sort
> of default VM managers provide mmap to those applications who don't
> want to manage their phsical memory, should they trust these VM
> managers?

As I tried to explain in my last email, there is no default VM
*server*.  There is a default VM *library*.

> My conclusion is, if Sawmill's framework has security problem on
> trust model, so has Hurd.

I don't see how this logically follows.

Thanks,
Neal