On Wed, Jul 17, 2019 at 01:01:27PM +0200, Miroslav Benes wrote: > > On a related note, do you think it would be feasible to extend (in > > another patchset) the reliable stack unwinding code a bit so that we > > could feed it pre-baked stacks ... then we could verify that the code > > was finding interesting scenarios. That was a passing thought I had > > back when Nicolai and I were debugging the ppc64le exception frame > > marker bug, but didn't think it worth the time/effort at the time. > > That is an interesting thought. It would help the testing a lot. I will > make a note in my todo list. Another idea I had for reliable unwinder testing: add a CONFIG_RELIABLE_STACKTRACE_DEBUG option which does a periodic stack trace and warns if it doesn't reach the end. It could triggered from a periodic NMI, or from schedule(). -- Josh
