Re: Supermicro X9SRL-F - channel enumeration error & ACPI/firmware bug question

Bruno Prémont
2012-11-26T21:43:05Z

Hi Justin,

On Sat, 24 November 2012 "Justin Piszcz" wrote:
> Is the following normal on an X9SRL-F board (bios 1.0a)?
>
> In the manual it states:
>
> Data Direct I/O
> Select Enabled to enable Intel I/OAT (I/O Acceleration Technology), which
> significantly reduces CPU overhead by leveraging CPU architectural
> improvements and freeing the system resource for other tasks. The options
> are Disabled and Enabled.
>
> Default is Enabled.
>
> When enabled in the kernel, I see the following:
>
> [ 0.696357] ioatdma: Intel(R) QuickData Technology Driver 4.00
> [ 0.696487] ioatdma 0000:00:04.0: channel error register unreachable
> [ 0.696546] ioatdma 0000:00:04.0: channel enumeration error
> [ 0.696604] ioatdma 0000:00:04.0: Intel(R) I/OAT DMA Engine init failed
> [ 0.696721] ioatdma 0000:00:04.1: channel error register unreachable
> [ 0.696779] ioatdma 0000:00:04.1: channel enumeration error
> [ 0.697522] ioatdma 0000:00:04.1: Intel(R) I/OAT DMA Engine init failed
> [ 0.697617] ioatdma 0000:00:04.2: channel error register unreachable
> [ 0.697681] ioatdma 0000:00:04.2: channel enumeration error
> [ 0.697739] ioatdma 0000:00:04.2: Intel(R) I/OAT DMA Engine init failed
> [ 0.697831] ioatdma 0000:00:04.3: channel error register unreachable
> [ 0.697890] ioatdma 0000:00:04.3: channel enumeration error
> [ 0.697948] ioatdma 0000:00:04.3: Intel(R) I/OAT DMA Engine init failed
> [ 0.698037] ioatdma 0000:00:04.4: channel error register unreachable
> [ 0.698095] ioatdma 0000:00:04.4: channel enumeration error
> [ 0.698153] ioatdma 0000:00:04.4: Intel(R) I/OAT DMA Engine init failed
> [ 0.698245] ioatdma 0000:00:04.5: channel error register unreachable
> [ 0.698303] ioatdma 0000:00:04.5: channel enumeration error
> [ 0.698360] ioatdma 0000:00:04.5: Intel(R) I/OAT DMA Engine init failed
> [ 0.698449] ioatdma 0000:00:04.6: channel error register unreachable
> [ 0.698508] ioatdma 0000:00:04.6: channel enumeration error
> [ 0.698565] ioatdma 0000:00:04.6: Intel(R) I/OAT DMA Engine init failed
> [ 0.698676] ioatdma 0000:00:04.7: channel error register unreachable
> [ 0.698735] ioatdma 0000:00:04.7: channel enumeration error
> [ 0.698792] ioatdma 0000:00:04.7: Intel(R) I/OAT DMA Engine init failed
>
> --
>
> Also, I tried using ASPM (enabled in BIOS), but since ACPI Linux query is
> ignored, it fails to work:
> [ 0.562229] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
>
> I assume this is something Supermicro has to fix?

You are probably missing some kernel config option(s) :) - I did fight similar
issues on a Fujitsu SandyBridge Xeon based server.

Check if enabling CONFIG_X86_X2APIC helps as well as other APIC/IOMMU options.

Bruno