From: khc@pm.waw.pl (Krzysztof Halasa)
To: linux-arm-kernel@lists.infradead.org
Subject: ixp4xx dmabounce
Date: Thu, 24 Sep 2009 18:51:50 +0200 [thread overview]
Message-ID: <m3ljk4xp3t.fsf@intrepid.localdomain> (raw)
In-Reply-To: <a104b22c0909240902g31da6983w26be4526cbdfc16c@mail.gmail.com> (Brian Walsh's message of "Thu, 24 Sep 2009 12:02:25 -0400")
Brian Walsh <brian@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
next prev parent reply other threads:[~2009-09-24 16:51 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-17 21:02 ixp4xx dmabounce Brian Walsh
2009-09-17 21:53 ` Russell King - ARM Linux
2009-09-22 22:02 ` Brian Walsh
2009-09-27 16:55 ` Russell King - ARM Linux
2009-09-29 15:16 ` Brian Walsh
2009-09-22 23:42 ` Mikael Pettersson
2009-09-23 14:40 ` Krzysztof Halasa
2009-09-24 16:02 ` Brian Walsh
2009-09-24 16:50 ` Mikael Pettersson
2009-09-24 22:15 ` Brian Walsh
2009-09-24 23:34 ` Mikael Pettersson
2009-09-24 23:43 ` Brian Walsh
2009-09-24 16:51 ` Krzysztof Halasa [this message]
2009-09-24 16:57 ` Brian Walsh
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