Mailinglist Archive: opensuse (3605 mails)

[Per Jessen <per@xxxxxxxxxxxx>]

Bryan J. Smith wrote:

> On Mon, 2006-06-12 at 15:03 +0200, Per Jessen wrote:
>> Isn't that more or less what I started this thread with?
> 
> The problem is that you're applying kernel modes to application ABI.

I am?  I'll take your word for it. 

>> Which is what I am ALSO saying.  The application does not go beyond
>> the 4Gb address space, the operating system (in our case Linux) does
>> that for the application.
> 
> Again, re-read this portion ...
> 
>   "Because processes running in these environments have 32-bit
>    pointers"
> 
> First, the processes are built for 32-bit/4GiB pointers.  That's a
> _hard_ limit.

Bryan, sometimes you do need to read what others say - you're preaching
to the choir.  I started out saying that the 4Gb address space for the
application does NOT change just because we make the OS PAE-aware. 

> That does _not_ mean the applications can use 36-bit.  That means the
> OS is using page translation to "window" 36-bit physical memory into
> 32-bit flat memory.

I know, and I've never said otherwise.  James Knott was the one claiming
that the application had to be PAE-aware in order to make use (e.g.
execute in) of physical memory above 4Gb.



/Per Jessen, Zürich


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