1. Run kernel menuconfig using below cmds
   1. peta-linux : "petalinux-config -c kernel"
   2. yocto: " bitbake -f virtual/kernel -c menuconfig"
2. Go to Device Drivers→Generic Driver options→ DMA Contiguous Memory Allocator
3. Set default contiguous memory size as per your preferred value depending upon your usecase
4. Save the configuration, exit the menuconfig and build images