FUJITA Tomonori wrote:
On Wed, 18 Feb 2009 17:05:44 -0500
Chuck Ebbert <cebbert@xxxxxxxxxx> wrote:
On Wed, 18 Feb 2009 15:25:16 -0500
Chuck Ebbert <cebbert@xxxxxxxxxx> wrote:
On Tue, 17 Feb 2009 20:22:05 +0900
FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx> wrote:
sata_nv 0000:00:0d.0: DMA-API: device driver frees DMA memory with different
size [device address=0x00000000da031000] [map size=4096 bytes] [unmap
That's rather curious. It seems to be saying that the sg length is
different between the map and unmap, but it doesn't look like sata_nv
mucks with that anywhere, and neither does libata core..
Could the SCSI code have merged two requests?
I wouldn't think so.. and if it did it seems like it would have to have
changed the list after libata got the request somehow..
Does this box uses GART IOMMU?
I don't think so, but I've asked for the dmesg.
Okay, it _is_ using GART IOMMU:
DMA-API: preallocated 8192 debug entries
DMA-API: debugging enabled by kernel config
PCI-DMA: Disabling AGP.
PCI-DMA: aperture base @ 20000000 size 65536 KB
PCI-DMA: using GART IOMMU.
PCI-DMA: Reserving 64MB of IOMMU area in the AGP aperture
Thanks, that makes sense.
I think that the following patch could fix this:
http://marc.info/?l=linux-ide&m=123484533504307&w=2
The patch looks reasonable to me. I'm CCing the reporter of the bug.
Wes, would you be able to test out Fujita's patch linked above?
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