On Wed, Mar 19, 2008 at 2:57 AM, Bernd Schubert <bs@xxxxxxxxx> wrote:
> Hello,
>
> from my understanding of ioatdma it just should be loaded before raid456 to
> make use it, shouldn't it?
>
> I just wonder why memcpy_count and bytes_transferred in /sys/class/dma/* is
> always zero.
>
Currently only network traffic will update these counts. They are not
currently hooked up for the raid/async_tx case. NET_DMA uses
dma_async_memcpy_*() whereas MD uses async_memcpy().
In my tests with the iop-adma driver on an iop342. I look at
/proc/interrupts to check that things are alive and kicking.
You could add the following to async_memcpy():
cpu = get_cpu();
per_cpu_ptr(chan->local, cpu)->bytes_transferred += len;
per_cpu_ptr(chan->local, cpu)->memcpy_count++;
put_cpu();
--
Dan
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