Greetings, Not so hypothetical situation: CPUs are having a major SCSI induced IPI fest, printk via serial port is happening while the storm is raging. Can it happen that while IRQs are disabled, multiple IPIs arrive, thus losing one or more? Seems like that possibility _has_ to be excluded by hardware for SMP to actually work (and it generally does;) but...
I ask because of a dump I saw, where CPU3 waits for CPU1 forever after having IPId all CPUs, with all except CPU1 having responded. CPU1, seemingly unaware of any such IPI, was then used to trigger that very dump, ie was not busted/stuck, which looked rather like a lost IPI. -Mike -- 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/
