Hi Robert, On 25/02/16 11:02, Robert Richter wrote: > From: Robert Richter <rrichter@xxxxxxxxxx> > > This series implements the use of CMA for allocation of large device > tables for the arm64 gicv3 interrupt controller. > > There are 2 patches, the first is for early activation of cma, which > needs to be done before interrupt initialization to make it available > to the gicv3. The second implements the use of CMA to allocate > gicv3-its device tables. > > This solves the problem where mem allocation is limited to 4MB. A > previous patch sent to the list to address this that instead increases > FORCE_MAX_ZONEORDER becomes obsolete. I think you're looking at the problem the wrong way. Instead of going through CMA directly, I'd rather go through the normal DMA API (dma_alloc_coherent), which can itself try CMA (should it be enabled). That will give you all the benefit of the CMA allocation, and also make the driver more robust. I meant to do this for a while, and never found the time. Any chance you could have a look? Thanks, M. -- Jazz is not dead. It just smells funny... -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>