On Tue, Nov 07, 2017 at 11:06:39AM +0100, Richard Genoud wrote: > > 3 short articles how to configure and use ftrace are here: > > https://lwn.net/Articles/365835/ > > https://lwn.net/Articles/366796/ > > https://lwn.net/Articles/370423/ > > > I tried with ftrace, but I don't think there's a way to dump the trace > when there's a soft lock-up > (I can't do anything after the unbind, even the heartbeat led stopped blinking). > I saw the /proc/sys/kernel/ftrace_dump_on_oops file, but there's no > /proc/sys/kernel/ftrace_dump_on_soft_lock-up file :) You should configure function trace with rt2x* functions. After that start tracing, unbind the device, then stop tracing and provide trace output. Thanks Stanislaw
