>>>>> [2015-02-25T08:37:59+0530]: "manty kuma" (manty-kuma): ,----[ manty-kuma ] | What happens if an interrupt comes while in middle of printk execution and | the interrupt handler has a printk in it? | | There is a chance that the log_buf could be corrupted. isn't it? `---- no this doesn't happen. look at vprintk_emit(...) which invokes local_irq_save(...).
essentially, printk tries to acquire console_lock. if it succeeds all is well. otherwise, output is dumped to a log buffer. when the current holder of console_lock, unlocks it, log buffer is emptied... --- thanks anupam _______________________________________________ Kernelnewbies mailing list [email protected] http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
