Hi all,

What is the difference between the following memory allocations.

 

1) Memory allocation by doing,

      char *buf;

      buf = kmalloc(BUF_LEN, GFP_DMA | GFP_KERNEL);

 

2) And by

      char *buf;

      buf = dma_alloc(...);

 

in the link http://www.arm.linux.org.uk/developer/memory.txt

it says that dma_alloc() returns virtual address in "ffc00000-----fffeffff" this region,

 

while in the first case it is returning Virtual address in "low-memory" region.

 

For DMA mappable memory which one we should use..?

--
With regards,
Sandeep Kumar Anantapalli,