This should help.
On Mon, Aug 17, 2009 at 9:38 PM, Devesh Sharma <devesh28@xxxxxxxxx> wrote:
On Tue, Aug 18, 2009 at 9:17 AM, MulyadiIf you do not require contiguous memory, use multiple calls of
Santosa<mulyadi.santosa@xxxxxxxxx> wrote:
> On Tue, Aug 18, 2009 at 4:03 AM, <vadimbox@xxxxxxxx> wrote:
>> Hi,
>>
>> I trying to allocate huge amount of memory >4GB (64bit) in LKM:
>>
get_free_pages with order 10
and have some simple buffer managament scheme over it.
>> kmalloc - has limit.
>> multiple kmalloc (about 2000) - kernel panic.
>> vmalloc - has limit (aswell as multiple vmalloc).
>> appending kernel parameter vmalloc=2048M - kernel panic on boot.
>>
>> So, is there the way to allocate huge amount of memory?
>> Haven't tried alloc_bootmem yet - is it the answer?
>>
>> kernel 2.6.24.5
>
> How about HugeTLB? the one that will use 2MB or 4MB page size.... but
> I never read exactly which APIs you have to use.
>
> I also don't know whether the reserved virtual address space range is
> sufficient for your need, but since we're talking about 64 bit kernel
> here, I guess you have plenty of room.
>
> --
> regards,
>
> Mulyadi Santosa
> Freelance Linux trainer
> blog: the-hydra.blogspot.com
>
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