On Sunday 05 April 2009, Ingo Molnar wrote: > > * Rafael J. Wysocki <rjw@xxxxxxx> wrote: > > > From: Rafael J. Wysocki <rjw@xxxxxxx> > > > > Sysdev have to be suspended and resumed with interrupts disabled > > and things usually break in a way that's difficult to debug if one > > of sysdev drivers enables interrupts by mistake during suspend or > > resume. Add extra checks that will generate warnings in such > > cases. > > no objections - but obviously the real solution would be to finish > PeterZ's "detect assymetric kernel functions" patch: > > That patch (Peter posted an initial version of it already on lkml) > works the following way: > > the ftrace function-graph-tracer plugin is utilized to instrument > every function call in the kernel. That is extended with the > following check: every function except __lockfunc and __sched > functions must be 'balanced' - i.e. they must enter and exit with > the same IRQ flags, preempt count and lock depth counter. Nothing wrong with that, but I'd also like to have checks that don't depend on ftrace. :-) Thanks, Rafael _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
