July 29, 2011
9:12 a.m.
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,