The linux-next series "iommu/vt-d: Delegate DMA domain to generic iommu" [1] causes a system with the rootfs on megaraid_sas card unable to boot.
Reverted the whole series on the top of linux-next (next-20190607) fixed the issue. The information regards this storage card is, [ 116.466810][ T324] megaraid_sas 0000:06:00.0: FW provided supportMaxExtLDs: 0 max_lds: 32 [ 116.476052][ T324] megaraid_sas 0000:06:00.0: controller type : iMR(0MB) [ 116.483646][ T324] megaraid_sas 0000:06:00.0: Online Controller Reset(OCR) : Enabled [ 116.492403][ T324] megaraid_sas 0000:06:00.0: Secure JBOD support : Yes [ 116.499887][ T324] megaraid_sas 0000:06:00.0: NVMe passthru support : No [ 116.507480][ T324] megaraid_sas 0000:06:00.0: FW provided [ 116.612523][ T324] megaraid_sas 0000:06:00.0: NVME page size : (0) [ 116.629991][ T324] megaraid_sas 0000:06:00.0: INIT adapter done [ 116.714789][ T324] megaraid_sas 0000:06:00.0: pci id : (0x1000)/(0x0017)/(0x1d49)/(0x0500) [ 116.724228][ T324] megaraid_sas 0000:06:00.0: unevenspan support : no [ 116.731518][ T324] megaraid_sas 0000:06:00.0: firmware crash dump : no [ 116.738981][ T324] megaraid_sas 0000:06:00.0: jbod sync map : yes [ 116.787433][ T324] scsi host0: Avago SAS based MegaRAID driver [ 117.081088][ T324] scsi 0:0:0:0: Direct- Access LENOVO ST900MM0168 L587 PQ: 0 ANSI: 6 [1] https://lore.kernel.org/patchwork/cover/1078960/
