how to allocate 9MB of memory in kernel ?

Misbah khan misbah_khan at
Fri Jul 18 14:44:58 EST 2008

This i am not very sure with  :-
Can we allocate 9MB using vmalloc and assure it to be low memory and not
highmem ?
can we ioremap 9 MB SDRAM to kernel virtual ?
can we use vmalloc and do mmap to that allocated memory ,if the pages are
not continues then is it going to concern mapping to user space ?

---Misbah <><

Arnd Bergmann wrote:
> On Thursday 17 July 2008, Misbah khan wrote:
>> I need to allocate 9 MB of memory in to the kernel space which i need to
>> mmap for the application to access.
>> I need to know what could be the best possible way of doing the same.
> If you don't need the memory to be physically contiguous, you can use
> vmalloc to get the memory, but then you need to use remap_vmalloc_range
> for mapping the memory into a user address space.
> 	Arnd <><
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