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SubjectRe: bad DMAR interaction with iwlagn and SATA
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Hi Jeff,

On Friday 26 September 2008, you wrote in "Re: bad DMAR interaction with
iwlagn and SATA":
> Andres Freund wrote:
> > sleeping I activated DMAR...
> > ..
> > Second:
> > [ 2937.484251] DMAR:[DMA Read] Request device [00:1f.2] fault addr
> > fffbf000 [ 2937.484255] DMAR:[fault reason 06] PTE Read access is not set
> > [ 2937.484297] ata1.00: exception Emask 0x60 SAct 0x1 SErr 0x800 action
> > 0x6 frozen
> > [ 2937.484303] ata1.00: irq_stat 0x20000000, host bus error
> > [ 2937.484309] ata1: SError: { HostInt }
> > [ 2937.484319] ata1.00: cmd 61/08:00:c0:1d:6b/00:00:07:00:00/40 tag 0 ncq
> > 4096 out
> > [ 2937.484321] res 40/00:00:c0:1d:6b/00:00:07:00:00/40 Emask
> > 0x60 (host bus error)
> Ouch, a host bus error is serious nastiness...
I only hit that with DMAR activated (hit it twice, different boots), so it
seems to be related to that. Is there anything I can help to debug that?

Andres
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