From mboxrd@z Thu Jan 1 00:00:00 1970 From: brian@walsh.ws (Brian Walsh) Date: Thu, 24 Sep 2009 12:57:29 -0400 Subject: ixp4xx dmabounce In-Reply-To: References: <19129.24807.954274.688709@pilspetsen.it.uu.se> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, Sep 24, 2009 at 12:51 PM, Krzysztof Halasa wrote: > Brian Walsh 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 > Ha. Yes, I did enable that option. I am doing my testing just by using wget to pull a file over the connection.