On Tue, 30 Sep 2014 16:26:49 +0530 Amit Virdi <amitvi...@gmail.com> wrote:
> Hi, > > I'm trying to enable Ftrace on my ARM based MMU-less system. > Unexpectedly, I don't see tracing directory under /sys/kernel/debug > I have done the following so far but no success: > 1. Verified that I have enabled these flags in my .config > CONFIG_FUNCTION_TRACER > CONFIG_FUNCTION_GRAPH_TRACER > CONFIG_STACK_TRACER > CONFIG_DYNAMIC_FTRACE > > 2. Enabled Ftrace startup steps. The startup log output is > ---- > > Can anyone help what I'm missing or if ftrace is supported on MMU-less > platforms? Well it's obviously supported if you see the tests running. Is there anything else under /sys/kernel/debug? If not you need to mount the debugfs filesytem there. It wont do it itself. # mount -t debugfs nodev /sys/kernel/debug -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
