On Mon, Apr 13, 2015 at 09:38:01PM -0500, Suresh E. Warrier wrote: > +static u64 *get_write_timestamp(struct ring_buffer_per_cpu *cpu_buffer, > + unsigned long *flags) > +{ > + if (rb_precise_nested_write_ts()) { > + /* > + * Ensure that we are not preempted until after we update > + * the write timestamp. > + */ > + local_irq_save(*flags); > + return &cpu_buffer->last_stamp;
Yeah, ever hear about NMIs? This isn't going to work. > + } else { > + return &cpu_buffer->write_stamp; > + } > +} -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/