Messages in this thread | | | Date | Tue, 28 Apr 2009 18:43:49 +0900 | Subject | Re: [Bug #13001] PCI-DMA: Out of IOMMU space | From | FUJITA Tomonori <> |
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On Tue, 28 Apr 2009 14:18:57 +0500 **UNKNOWN CHARSET** <optimusgd@gmail.com> wrote:
> No, it is regression. I can reproduce that without allowdac and any > other unnecessary boot options.
Hmm, in the bug repport, you said that you can't reproduce the problem:
http://bugzilla.kernel.org/show_bug.cgi?id=13001#c15
I can't find your comment like, "I can reproduce that without allowdac".
> In later discussion Grant Grundler ask > me apply patch that show 32 bit dma devices in my system. Results I > attached to bugreport. Looks like only one 32 bit dma device in my > system is ata controller, sata-nv.
Hmm, looks like http://bugzilla.kernel.org/attachment.cgi?id=20895 said that pata_amd and sata_nv use 32bit dma mask.
> I can stable reproduce IOMMU out of space when I write data to sata > drive.
Ok, let's figure out what's wrong.
First, can you test v2.6.30-rc3 with the following patch?
http://www.kernel.org/pub/linux/kernel/people/tomo/misc/gart-debug.diff
Note that please enable CONFIG_DMA_API_DEBUG, CONFIG_IOMMU_DEBUG, and CONFIG_IOMMU_LEAK and see if you can reproduce the problem (of course, don't use any kernel option).
When the kernel is out of IOMMU space, it prints some useful information.
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