ixp4xx dmabounce
Krzysztof Halasa
khc at pm.waw.pl
Thu Sep 24 12:51:50 EDT 2009
Brian Walsh <brian at walsh.ws> writes:
> I tried Krzysztof's patch and it had no noticeable affect. I am still getting
> about 6.3 Mbps IP data throughput when only using the ohci controller and
> about 3.6 Mbps when the device is attached to the ehci controller. This
> device works fine when running the same testing attached to an x86
> configured machine and gets about 18 Mbps IP data throughput.
I assume you've enabled CONFIG_ZONE_DMA_ALL_KERNEL :-)
Either the bouncing isn't the problem in this case, or the allocations
are GFP_USER.
--
Krzysztof Halasa
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