Hi folks, I got quite a number of weird messages in kernel log on the host (Dell Poweredge R750) with a JBOSS and a MegaRAID controller card : [Mon Jun 10 00:14:04 2024] dmar_fault: 2930 callbacks suppressed [Mon Jun 10 00:14:04 2024] DMAR: DRHD: handling fault status reg 3 [Mon Jun 10 00:14:04 2024] DMAR: [DMA Write NO_PASID] Request device [05:00.0] fault addr 0xeb61a000 [fault reason 0x05] PTE Write access is not set [Mon Jun 10 00:14:04 2024] DMAR: DRHD: handling fault status reg 3 [Mon Jun 10 00:14:04 2024] DMAR: [DMA Write NO_PASID] Request device [05:00.0] fault addr 0xe5bd9000 [fault reason 0x05] PTE Write access is not set [Mon Jun 10 00:14:04 2024] DMAR: DRHD: handling fault status reg 3 [Mon Jun 10 00:14:04 2024] DMAR: [DMA Write NO_PASID] Request device [05:00.0] fault addr 0xee7c3000 [fault reason 0x05] PTE Write access is not set [Mon Jun 10 00:14:04 2024] DMAR: DRHD: handling fault status reg 3 : Device 05:00:0 is the JBOSS RAID controller hosting 2 SSDs in RAID1: root@node16:~# lspci | grep -i raid 05:00.0 SATA controller: Marvell Technology Group Ltd. 88SE9230 PCIe 2.0 x2 4-port SATA 6 Gb/s RAID Controller (rev 11) 17:00.0 RAID bus controller: Broadcom / LSI MegaRAID 12GSAS/PCIe Secure SAS39xx Is this something to worry about? Kernel is 6.1.90 (included in Debian 12), firmware is provided by Debian as well. This is a production system, so I hesitate to install a more recent kernel and firmware without further infor- mation. Every helpful comment is highly appreciated Regards Harri
