On Mon, Jun 25, 2012 at 1:00 PM, Mulyadi Santosa
[off-list ref]wrote:

Hi.... :)

On Sun, Jun 24, 2012 at 1:32 AM, Subramaniam Appadodharana
[off-list ref] wrote:

quoted

Hi All,
I am trying to understand how vmalloc memory is reserved in kernel. In

3.4+

quoted

latest kernel, the default vmalloc size is 240MB.

vmalloc reserved address range, you meant?

quoted

Is this a carveout from
the 1GiB memory that kernel has?

Yup....

quoted

In other words can I do a __pa(VMALLOC_START) or __pa(VMALLOC_END)
or __pa(highmemory) irrespective of the vmalloc size that I request, say
 doing vmalloc=1G?

uhm....not sure....vmalloc-ed is not physically contigous. Also, it is
set up far after identity mapping setup. So, the value you get from
__pa() IMHO would be likely invalid or has no meaning.

I thought that, as log as we know that the address is within  the 1GiB, we

could get the
pa of the virtual address using __pa(). Is this not the case?

--
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

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