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    SubjectRunning out of SWIOTLB space (was: SW-IOMMU / ata_piix errors with 2.6.27-rc1)
    Robert Hancock wrote:
    > Tejun Heo wrote:
    >> Juergen Kreileder wrote:
    >>> Robert Hancock wrote:
    >>>> Juergen Kreileder wrote:
    >>>>> Hi,
    >>>>>
    >>>>> I get lots of errors like this with 2.6.27-rc1 on my
    >>>>> Macbook Pro (3rd generation), 2.6.26 seems to work fine:
    >>>>>
    >>>>> [ 907.524509] DMA: Out of SW-IOMMU space for 45056 bytes at device 0000:00:1f.2
    >>>>> [ 907.524783] ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
    >>>>> [ 907.524796] ata3.00: cmd 35/00:50:08:91:5c/00:01:0f:00:00/e0 tag 0 dma 172032 out
    >>>>> [ 907.524798] res 50/00:00:ff:90:5c/00:00:0f:00:00/ef Emask 0x40 (internal error)
    >>>>> [ 907.524805] ata3.00: status: { DRDY }
    >>>>> [ 907.646590] ata3.00: configured for UDMA/133
    >>>>> [ 907.646624] ata3: EH complete
    >>>>> Any suggestions?
    >>>> You can try increasing the swiotlb size by booting with swiotlb=65536
    >>>> (for 128MB) or swiotlb=131072 (for 256MB), and see if that makes the
    >>>> problem go away.. It's unclear why you'd be running out of SWIOTLB space
    >>>> now, though, if 2.6.26 worked fine..
    >>> Still happening, although 256M make it a bit harder to trigger.
    >> Hmm... sounds like mapping is leaking. Eh... iommu leak debug seems to
    >> support only AMD GART IOMMU. How long does it take to reproduce the
    >> bug? Once it happens, it never recovers, right? Does the problem
    >> happen with minimal configuration w/ only libata enabled (no network, no
    >> sound, no usb...)?
    >
    > Yes, that would be a good test.. Easiest way might be booting with
    > init=/bin/sh and running some processes that do lots of disk access..

    After a bit more testing I'm pretty sure the problem is caused by an
    external driver, namely the new ath9k driver.

    Sorry for the noise on the wrong lists.


    Juergen

    --
    Juergen Kreileder, Blackdown Java-Linux Team
    http://blog.blackdown.de/


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