On Wed, Nov 13, 2013 at 8:59 PM, Richard Yao <[email protected]> wrote:
> On 11/12/2013 06:14 PM, Paul B. Henson wrote: > >> From: Richard Yao [mailto:[email protected]] > >> Sent: Tuesday, November 12, 2013 9:00 AM > >> > >> I recompiled my kernel with support and I now see some rather reassuring > >> messages in dmesg about an IOMMU being used for various devices. It is > > > > To clarify, do you mean CONFIG_INTEL_IOMMU and > > CONFIG_INTEL_IOMMU_DEFAULT_ON? > > I neglected to answer this question in my previous email. Yes, I meant > both. > > > _______________________________________________ > developer mailing list > [email protected] > http://lists.open-zfs.org/mailman/listinfo/developer > > If it help believe I have experienced a pci device that fails if I enable IOMMU on linux: 08:00.0 SATA controller: Marvell Technology Group Ltd. 88SE9123 PCIe SATA 6.0 Gb/s controller (rev 11) (prog-if 01 [AHCI 1.0]) Subsystem: Marvell Technology Group Ltd. 88SE9123 PCIe SATA 6.0 Gb/s controller Flags: bus master, fast devsel, latency 0, IRQ 40 I/O ports at cf00 [size=8] I/O ports at ce00 [size=4] I/O ports at cd00 [size=8] I/O ports at cc00 [size=4] I/O ports at cb00 [size=16] Memory at fdbff000 (32-bit, non-prefetchable) [size=2K] [virtual] Expansion ROM at fda00000 [disabled] [size=64K] Capabilities: [40] Power Management version 3 Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [70] Express Legacy Endpoint, MSI 00 Capabilities: [100] Advanced Error Reporting Kernel driver in use: ahci I lose access to both drives on that controller and lots of bad sata related kernel messages, I haven't re-tried since my last few kernel upgrades, but my hunch is that it's the card. Cheers Andrew
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