Re: scatter/gather or kmalloc for allocating memory of size 50 Kbytes

[sudheer <urwithsudheer@xxxxxxxxx>]

Muneeswaran P - TLS, Chennai wrote:

> Hi,
>
> Please let me know which memory allocation method will be more suitable for
> memory size 50 Kilobytes ?
>
> ( scatter/gather or kmalloc method )?
>  
you can allocate upto 128kb(maximum) using kmalloc - linux device 
driver -Rubini - Chapter:7 - Topic: Size Argument

> This memory should be memory mapped to user application and will be used in
> PCI-Bus master data transfer.
>  
After allocating the memory with kmalloc , you have to reserve all the 
pages .
Then from your user application call memory map function(mmap() -  file 
operation  )      which should "remap the memory pages in kernel" .(user 
should implement  it).

Regards
Sudheer

> Regards,
> Munees.
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