Am 25.10.2012 03:24, schrieb Ming Lei:
>> Lei, do you have any doc describing how to use those tracepoints?
>
> Hi Bjorn Helgaas,
>
> Firstly, please enable these tracepoints via below
>
>            echo 1 > /sys/kernel/debug/tracing/events/rpm/enable
>
> then store the trace event result by below once you make sure your interested
> events are completed:
>
>            echo 0 > /sys/kernel/debug/tracing/events/rpm/enable
>            cp /sys/kernel/debug/tracing/trace /media/ram/rpm-trace
>
Hi,

I have created a trace according this description. Therefore I have 
rebooted my system, enabled the trace and inserted and removed the 
SD-card until the controller stops working. During this procedure I 
observed that the controller seems to be more stable. I had to insert 
and remove the SD-card several times until the controller stopped 
working. Normally the controller will fail on the first attempt. Also I 
had the impression (not sure about this since I have not measured it) 
that the card reader reads the data faster.

I append the gzipped trace and the corresponding dmesg output.

Best Regards
Uli
-- 
Ulrich Eckhardt                  http://www.uli-eckhardt.de

Ein Blitzableiter auf dem Kirchturm ist das denkbar stärkste
Misstrauensvotum gegen den lieben Gott. (Karl Krauss)