vmalloc size

[Subramaniam Appadodharana]

Hi All,
I am trying to understand how vmalloc memory is reserved in kernel. In 3.4+
latest kernel, the default vmalloc size is 240MB. Is this a carveout from
the 1GiB memory that kernel has?

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?


Thank you and Regards
Subbu
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