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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