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SubjectRe: 4.19-rc3: IOMMU PT warnings: WARNING: CPU: 0 PID: 1 at mm/page_alloc.c:4065 __alloc_pages_slowpath+0xb7b/0xcd0
> Given the __alloc_pages_slowpath() warning, this looks like it's probably
> stemming from the oversized PASID table issue which a few other folks have hit
> too. I think this patch is the most up-to-date fix:
>
> https://www.mail-archive.com/iommu@lists.linux-foundation.org/msg25639.html

The warning is gone but there seem to be more warnings about
IOMMU_DOMAIN_DMA:

[ 0.171992] DMAR: Host address width 39
[ 0.171994] DMAR: DRHD base: 0x000000fed90000 flags: 0x0
[ 0.171998] DMAR: dmar0: reg_base_addr fed90000 ver 1:0 cap 1c0000c40660462 ecap 19e2ff0505e
[ 0.171999] DMAR: DRHD base: 0x000000fed91000 flags: 0x1
[ 0.172002] DMAR: dmar1: reg_base_addr fed91000 ver 1:0 cap d2008c40660462 ecap f050da
[ 0.172004] DMAR: RMRR base: 0x000000ca02f000 end: 0x000000ca04efff
[ 0.172005] DMAR: RMRR base: 0x000000cb800000 end: 0x000000cfffffff
[ 0.172007] DMAR-IR: IOAPIC id 2 under DRHD base 0xfed91000 IOMMU 1
[ 0.172008] DMAR-IR: HPET id 0 under DRHD base 0xfed91000
[ 0.173441] DMAR-IR: Enabled IRQ remapping in xapic mode

[...]

[ 0.324160] DMAR: No ATSR found
[ 0.324175] DMAR: dmar0: Using Queued invalidation
[ 0.324229] DMAR: dmar1: Using Queued invalidation
[ 0.324453] DMAR: Hardware identity mapping for device 0000:00:00.0
[ 0.324501] DMAR: Hardware identity mapping for device 0000:00:02.0
[ 0.324503] DMAR: Hardware identity mapping for device 0000:00:08.0
[ 0.324505] DMAR: Hardware identity mapping for device 0000:00:14.0
[ 0.324507] DMAR: Hardware identity mapping for device 0000:00:16.0
[ 0.324508] DMAR: Hardware identity mapping for device 0000:00:17.0
[ 0.324510] DMAR: Hardware identity mapping for device 0000:00:1b.0
[ 0.324512] DMAR: Hardware identity mapping for device 0000:00:1b.2
[ 0.324513] DMAR: Hardware identity mapping for device 0000:00:1b.3
[ 0.324515] DMAR: Hardware identity mapping for device 0000:00:1b.4
[ 0.324516] DMAR: Hardware identity mapping for device 0000:00:1c.0
[ 0.324518] DMAR: Hardware identity mapping for device 0000:00:1c.2
[ 0.324520] DMAR: Hardware identity mapping for device 0000:00:1c.4
[ 0.324521] DMAR: Hardware identity mapping for device 0000:00:1d.0
[ 0.324523] DMAR: Hardware identity mapping for device 0000:00:1f.0
[ 0.324524] DMAR: Hardware identity mapping for device 0000:00:1f.2
[ 0.324526] DMAR: Hardware identity mapping for device 0000:00:1f.3
[ 0.324528] DMAR: Hardware identity mapping for device 0000:00:1f.4
[ 0.324529] DMAR: Hardware identity mapping for device 0000:00:1f.6
[ 0.324532] DMAR: Hardware identity mapping for device 0000:09:00.0
[ 0.324533] DMAR: Setting RMRR:
[ 0.324535] DMAR: Ignoring identity map for HW passthrough device 0000:00:02.0 [0xcb800000 - 0xcfffffff]
[ 0.324536] DMAR: Ignoring identity map for HW passthrough device 0000:00:14.0 [0xca02f000 - 0xca04efff]
[ 0.324539] DMAR: Prepare 0-16MiB unity mapping for LPC
[ 0.324540] DMAR: Ignoring identity map for HW passthrough device 0000:00:1f.0 [0x0 - 0xffffff]
[ 0.324576] DMAR: Intel(R) Virtualization Technology for Directed I/O
[ 0.324601] pci 0000:00:00.0: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324604] iommu: Adding device 0000:00:00.0 to group 0
[ 0.324610] pci 0000:00:02.0: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324613] iommu: Adding device 0000:00:02.0 to group 1
[ 0.324619] pci 0000:00:08.0: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324621] iommu: Adding device 0000:00:08.0 to group 2
[ 0.324629] pci 0000:00:14.0: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324631] iommu: Adding device 0000:00:14.0 to group 3
[ 0.324639] pci 0000:00:16.0: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324641] iommu: Adding device 0000:00:16.0 to group 4
[ 0.324647] pci 0000:00:17.0: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324649] iommu: Adding device 0000:00:17.0 to group 5
[ 0.324664] pci 0000:00:1b.0: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324666] iommu: Adding device 0000:00:1b.0 to group 6
[ 0.324673] pci 0000:00:1b.2: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324675] iommu: Adding device 0000:00:1b.2 to group 7
[ 0.324683] pci 0000:00:1b.3: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324685] iommu: Adding device 0000:00:1b.3 to group 8
[ 0.324693] pci 0000:00:1b.4: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324695] iommu: Adding device 0000:00:1b.4 to group 9
[ 0.324708] pci 0000:00:1c.0: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324711] iommu: Adding device 0000:00:1c.0 to group 10
[ 0.324718] pci 0000:00:1c.2: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324721] iommu: Adding device 0000:00:1c.2 to group 11
[ 0.324728] pci 0000:00:1c.4: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324730] iommu: Adding device 0000:00:1c.4 to group 12
[ 0.324738] pci 0000:00:1d.0: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324740] iommu: Adding device 0000:00:1d.0 to group 13
[ 0.324754] pci 0000:00:1f.0: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324757] iommu: Adding device 0000:00:1f.0 to group 14
[ 0.324763] pci 0000:00:1f.2: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324765] iommu: Adding device 0000:00:1f.2 to group 14
[ 0.324771] pci 0000:00:1f.3: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324773] iommu: Adding device 0000:00:1f.3 to group 14
[ 0.324779] pci 0000:00:1f.4: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324782] iommu: Adding device 0000:00:1f.4 to group 14
[ 0.324788] pci 0000:00:1f.6: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324790] iommu: Adding device 0000:00:1f.6 to group 15
[ 0.324797] pci 0000:02:00.0: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324800] iommu: Adding device 0000:02:00.0 to group 16
[ 0.324807] pci 0000:09:00.0: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
[ 0.324810] iommu: Adding device 0000:09:00.0 to group 17



--
Meelis Roos (mroos@linux.ee)

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