On Mon, Jan 19, 2015 at 4:53 PM, Charles Polisher <cpolish@xxxxxxxxxxxx> wrote:
> On Jan 07, 2015 at 01:47:53PM -0600, Les Mikesell wrote:
>>
>> I see a bunch of entries like:
>> ioatdma 0000:00:08.0: Channel halted, chanerr = 2
>> ioatdma 0000:00:08.0: Channel halted, chanerr = 0
>> in the logs and one of these:
>> hrtimer: interrupt took 258633 ns
>>
>> Not sure what those mean. We do have considerably more systems
>> running windows than linux on this hardware and I don't think anyone
>> has noticed a systemic problem there.
>
> Was this resolved? The ioatdma messages are from ioat_dma.c, a
> driver for Intel's I/OAT DMA engine typically used on high-end
> server hardware to accelerate network I/O. chanerr = 2 might be
> an issue with the DMA channel being in a suspended state when
> the driver isn't expecting it to be. Maybe a network driver bug.
No, reboots are rare on these servers and file corruption is rare even
within those, so I don't anticipate seeing enough instances to find a
pattern.
--
Les Mikesell
lesmikesell@xxxxxxxxx
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