> I have the reason to have to fill the node struct with 0 by memset. > The node is a part of node struct array (node_devices[]). > If we add empty release function for suppressing warning, > some data remains in the node struct after hot removing memory. > So if we re-hot adds the memory, the node struct is reused by > register_onde_node(). But the node struct has some data, because > it was not initialized with 0. As a result, more waning is shown > by the remained data at hot addinig memory as follows:
Even though you call memset(0) at offline. It doesn't guarantee the memory keep 0 until online. E.g. physical memory exchange during offline, bit corruption by cosmic ray, etc. So, you should fill zero at online phase explicitly if need. The basic hotplug design is: you should forget everything at offline and you shouldn't assume any initialized data at online. Thanks. -- 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/