On 02/26/2010 02:50 PM, Linus Torvalds wrote: > > > On Fri, 26 Feb 2010, Gábor Stefanik wrote: >> >> Does actually enabling mmiotrace fix it for you too? > > I haven't seen the report. What do you need to do? Certainly just enabling > CONFIG_MMIOTRACE does nothing, but I'd not expect it to - I'd expect that > you have to actually do the tracing itself. > > So if somebody has a recipe for me to test actual tracing of the module, I > can try to see if it makes a difference for me. If you do the following (as root): modprobe -r b43 echo 6400 > /sys/kernel/debug/tracing/buffer_size_kb echo mmiotrace > /sys/kernel/debug/tracing/current_tracer cat /sys/kernel/debug/tracing/trace_pipe > mydump.txt & modprobe b43 do some network activity, then echo nop > /sys/kernel/debug/tracing/current_tracer sleep 1 killproc cat That should be a good enough test. If your machine behaves the same as has been reported, you should see a DMA error at the point that tracing is turned off. Larry -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
