On 01/05, Oleg Nesterov wrote: > > Anyway. I modified the debugging patch a bit: > > --- K/arch/s390/kernel/traps.c~ 2009-12-22 10:41:52.909174198 -0500 > +++ K/arch/s390/kernel/traps.c 2010-01-05 09:49:19.541792379 -0500 > @@ -384,6 +384,8 @@ void __kprobes do_single_step(struct pt_ > } > if (tracehook_consider_fatal_signal(current, SIGTRAP)) > force_sig(SIGTRAP, current); > + else > + printk("XXX: %d %d\n", current->pid, > test_thread_flag(TIF_SINGLE_STEP)); > } > > static void default_trap_handler(struct pt_regs * regs, long > interruption_code) > -------------------------------------------------------------------------------
Ah, please ignore. I guess TIF_SINGLE_STEP was already cleared by the caller in entry.S Oleg.