Messages in this thread | | | Date | Sun, 7 Dec 2008 22:38:10 +0100 | From | "Giangiacomo Mariotti" <> | Subject | Re: [PROBLEM] Hw problem or software bug? DMA: Out of SW-IOMMU space.... |
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On Sun, Dec 7, 2008 at 7:47 PM, Robert Hancock <hancockr@shaw.ca> wrote: > > Seems like you have lots of disks, it could be you just have too much IO in > flight at the same time for the size of the IOMMU area. You might be able to > avoid that by increasing the SW-IOMMU size. > > However, your system should be AHCI capable, you should try to switch the > SATA controller into that mode in the BIOS (possibly labelled RAID mode or > something). Then it shouldn't need to use bounce buffers for disk access in > the first place (plus give you NCQ support). > I've done what you said, now is there anything I can do to see if the problem is solved? Use some program which produces a lot of IO? Is there any suggested IO stress test available?
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