Hi!
It's Oracle Linux Server release 7.7 fresh new install on a HP ProLiant DL360p Gen8.
It' WARNING get on every reboot:
Dec 4 13:03:53 oracle kernel: DMAR: ERROR: DMA PTE for vPFN 0xffed3 already set (to ba0563003 not 1838299002)
Dec 4 13:03:53 oracle kernel: ------------[ cut here ]------------
Dec 4 13:03:53 oracle kernel: WARNING: CPU: 19 PID: 2660 at drivers/iommu/intel-iommu.c:2322 __domain_mapping+0x368/0x374
Dec 4 13:03:53 oracle kernel: Modules linked in: iTCO_wdt iTCO_vendor_support sb_edac intel_powerclamp dm_service_time coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel ipmi_ssif pcbc sg aesni_intel crypto_simd glue_helper hpilo hpwdt cryptd pcspkr acpi_power_meter ioatdma dca shpchp lpc_ich ipmi_si ipmi_devintf ipmi_msghandler pcc_cpufreq dm_multipath ip_tables xfs libcrc32c ata_generic pata_acpi sd_mod mgag200 qla2xxx i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm ata_piix nvme_fc libata crc32c_intel nvme_fabrics tg3 serio_raw nvme_core hpsa scsi_transport_fc ptp scsi_transport_sas pps_core dm_mirror dm_region_hash dm_log dm_mod
Dec 4 13:03:53 oracle kernel: CPU: 19 PID: 2660 Comm: kdmwork-252:3 Not tainted 4.14.35-1902.7.3.1.el7uek.x86_64 #2
Dec 4 13:03:53 oracle kernel: Hardware name: HP ProLiant DL360p Gen8, BIOS P71 03/01/2013
Dec 4 13:03:53 oracle kernel: task: ffff910138ac0000 task.stack: ffffa5f1c7af8000
Dec 4 13:03:53 oracle kernel: RIP: 0010:__domain_mapping+0x368/0x374
Dec 4 13:03:53 oracle kernel: RSP: 0018:ffffa5f1c7afbaf8 EFLAGS: 00010002
Dec 4 13:03:53 oracle kernel: RAX: 0000000000000004 RBX: ffff90f4a1dd9698 RCX: 0000000000000000
Dec 4 13:03:53 oracle kernel: RDX: 0000000000000000 RSI: ffff91013efd69c8 RDI: ffff91013efd69c8
Dec 4 13:03:53 oracle kernel: RBP: ffffa5f1c7afbb58 R08: 00000000fffffffe R09: ffff910138057160
Dec 4 13:03:53 oracle kernel: R10: 0000000000000005 R11: 0000000001838299 R12: 0000000000000001
Dec 4 13:03:53 oracle kernel: R13: 0000001838299002 R14: 0000000000000001 R15: 00000000000ffed3
Dec 4 13:03:53 oracle kernel: FS: 0000000000000000(0000) GS:ffff91013efc0000(0000) knlGS:0000000000000000
Dec 4 13:03:53 oracle kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Dec 4 13:03:53 oracle kernel: CR2: 00007f23d400a000 CR3: 000000182f40a004 CR4: 00000000000606e0
Dec 4 13:03:53 oracle kernel: Call Trace:
Dec 4 13:03:53 oracle kernel: intel_map_sg+0x101/0x1f8
Dec 4 13:03:53 oracle kernel: qla24xx_start_scsi+0x482/0x5c0 [qla2xxx]
Dec 4 13:03:53 oracle kernel: qla24xx_dif_start_scsi+0x9ee/0xcf0 [qla2xxx]
Dec 4 13:03:53 oracle kernel: ? scsi_init_io+0x4c/0x1af
Dec 4 13:03:53 oracle kernel: ? kmem_cache_alloc+0x9e/0x1ce
Dec 4 13:03:53 oracle kernel: ? mempool_alloc_slab+0x15/0x17
Dec 4 13:03:53 oracle kernel: ? mempool_alloc+0x73/0x16c
Dec 4 13:03:53 oracle kernel: qla2xxx_queuecommand+0x400/0x4b0 [qla2xxx]
Dec 4 13:03:53 oracle kernel: scsi_dispatch_cmd+0xbc/0x272
Dec 4 13:03:53 oracle kernel: scsi_request_fn+0x4ea/0x6ef
Dec 4 13:03:53 oracle kernel: ? bio_alloc_bioset+0xb7/0x1fd
Dec 4 13:03:53 oracle kernel: __blk_run_queue+0x46/0x61
Dec 4 13:03:53 oracle kernel: __elv_add_request+0xff/0x27e
Dec 4 13:03:53 oracle kernel: blk_insert_cloned_request+0x139/0x1c2
Dec 4 13:03:53 oracle kernel: map_request+0x159/0x220 [dm_mod]
Dec 4 13:03:53 oracle kernel: map_tio_request+0x16/0x30 [dm_mod]
Dec 4 13:03:53 oracle kernel: kthread_worker_fn+0x7a/0x1ab
Dec 4 13:03:53 oracle kernel: kthread+0x105/0x138
Dec 4 13:03:53 oracle kernel: ? kthread_cancel_delayed_work_sync+0x20/0x15
Dec 4 13:03:53 oracle kernel: ? kthread_bind+0x20/0x15
Dec 4 13:03:53 oracle kernel: ret_from_fork+0x3e/0x49
Dec 4 13:03:53 oracle kernel: Code: f5 22 ae 4c 89 5d a0 4c 89 4d a8 e8 a6 3d bb ff 8b 05 3d 2b 04 01 4c 8b 4d a8 4c 8b 5d a0 85 c0 74 09 83 e8 01 89 05 28 2b 04 01 <0f> 0b e9 b5 fd ff ff e8 2c cd b4 ff 66 90 66 2e 0f 1f 84 00 00
Dec 4 13:03:53 oracle kernel: ---[ end trace cf7a271e91e55588 ]---
What is it? The operating system up to date, yum update completed.
Sometimes at CPU 0, sometimes at CPU 19 the problem comes up.
We newer seen similar. It will be a database server, and we don't know, is it can cause a faulty database?
Thanks for any assistance!