On Wed, Jun 23, 2021 at 02:59:59PM +0800, Kefeng Wang wrote: > Hi Greg, > > There are two more patches about the ZONE_DMA[32] changes, What ZONE_DMA changes? > especially the > second one, both them need be backported, thanks. Backported to where? > 791ab8b2e3db - arm64: Ignore any DMA offsets in the max_zone_phys() > calculation > 2687275a5843 - arm64: Force NO_BLOCK_MAPPINGS if crashkernel reservation is > required Have you tried these patches? Where do they need to be applied to? confused, greg k-h