Re: sata_nv frees DMA memory with different size (possibly a generic libata bug)

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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.

It's using an nVidia MCP55/C51 chipset if that's any help.

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