how can I cleanly exclude memory from the kernel memory allocator?

[Larry Bassel]

On 19 Apr 11 16:33, Larry Bassel wrote:
> On 25 Mar 11 20:27, Russell King - ARM Linux wrote:
> > On Fri, Mar 25, 2011 at 10:39:28AM -0700, Larry Bassel wrote:
> > > OK, please ignore my previous mail, I see that .fixup can be
> > > used to adjust tags. It appears to me, however, that using a
> > > .reserve function calling memblock_reserve will be an
> > > easier way of doing what I need.
> > 
> > Absolutely.
> 
> Hopefully I'm just missing something obvious, but
> when I call memblock_reserve (in .38) to reserve a block
> of memory away from the general kernel memory pool,
> I find that an ioremap of memory within the reserved block
> still fails because pte_valid() is apparently true.

I meant pfn_valid() not pte_valid() -- sorry.

> 
> Is this intended behavior? If so, what would the
> correct way of separating memory from the system be
> so that there is no longer a 1-to-1 1M mapping for
> this memory and ioremap (creating the *only* mapping
> for this memory) is allowed?
> 
> Thanks.
> 
> Larry
> 
> > 
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel at lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 
> -- 
> Sent by an employee of the Qualcomm Innovation Center, Inc.
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.