On Sun, Sep 27, 2015 at 06:27:49PM +0000, Gianfranco Costamagna wrote: > Hi, > > > first a question: does the user need to do modprobe ktapvm manually? > > > > well, can't the ktap tool do the job automagically? > > and moreover, how do the user know that a ktap source has a ktapvm kernel > module? > > > > I mean, I would expect a kernel module called "ktap" and maybe a readme > explaining me > (maybe in man ktap) that it needs a magic autoprobe > (or making it automatically load on system startup?)
I don't think that loading it at system startup is a good idea for now, but maybe some day (basically all it does is handle requests to /sys/kernel/debug/ktap/ktapvm but just in case I will not load it at start). As for man page, ktap will report next error: $ ktap /usr/share/doc/ktap/samples/basic/backtrace.kp open /sys/kernel/debug/ktap/ktapvm failed: No such file or directory But note in ktap(1) will be better, so added and uploaded to mentors: " ... NOTES To make ktap work, firstly you need to load "ktapvm" module: modprobe ktapvm ... " Thanks, Azat.