On 10/07, Oleg Nesterov wrote: > > Hmm. I know nothing about arch/alpha and I can't understand its entry.S. > But _it seems_ to me that do_notify_resume() is called with irqs disabled. > If this is true, then imho arch/alpha should be fixed. > > Before this commit task_work_run() enabled irqs, but this was the "side > effect" of spin_lock_irq/spin_unlock_irq, we should not rely on this. Could you please test the debugging patch below? Oleg. --- x/arch/alpha/kernel/signal.c +++ x/arch/alpha/kernel/signal.c @@ -567,11 +567,19 @@ do_signal(struct pt_regs * regs, struct ptrace_set_bpt(current); /* re-set breakpoint */ } +#include <linux/ratelimit.h> + void do_notify_resume(struct pt_regs *regs, struct switch_stack *sw, unsigned long thread_info_flags, unsigned long r0, unsigned long r19) { + if (irqs_disabled()) { + printk_ratelimited(KERN_WARNING + "NOTIFY with irqs_disabled:%lx\n", thread_info_flags); + local_irq_enable(); + } + if (thread_info_flags & _TIF_SIGPENDING) do_signal(regs, sw, r0, r19); -- To unsubscribe from this list: send the line "unsubscribe linux-alpha" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html