[PATCH v3 1/2] omap3: iovmm: Work around sg_alloc_table size limitation in IOMMU

[Russell King - ARM Linux]

On Mon, Jun 06, 2011 at 06:54:10PM +0200, Laurent Pinchart wrote:
> Of course not, but if the scatterlist is only touched by kernel code, it 
> doesn't need to be contiguous in memory. It could be allocated with vmalloc().

Except vmalloc has a higher latency and a more restrictive API than
other allocators (think about the coherency issues with SMP systems
which may have to do TLB flushing on several cores, etc.)