Re: [PATCH v5 2/3] x86, mpx: hook #BR exception handler to allocate bound tables

[H. Peter Anvin]

On 02/24/2014 09:27 AM, Dave Hansen wrote:
> 
> Can you talk a little bit about what the design is here?  Why does the
> kernel have to do the allocation of the virtual address space?  Does it
> really need to MAP_POPULATE?  bt_size looks like 4MB, and that's an
> awful lot of memory to eat up at once.  Shouldn't we just let the kernel
> demand-fault this like everything else?
> 

MAP_POPULATE definitely seems like the wrong thing.

	-hpa

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