On Tue, 2 Mar 2010, Christoph Lameter wrote: > > Not sure how this would sync with slab use during node bootstrap and > shutdown. Kame-san? > All the nodelist allocation and initialization is done during MEM_GOING_ONLINE, so there should be no use of them until that notification cycle is done and it has graduated to MEM_ONLINE: if there are, there're even bigger problems because zonelist haven't even been built for that pgdat yet. I can only speculate, but since Andi's patchset did all this during MEM_ONLINE, where the bit is already set in node_states[N_HIGH_MEMORY] and is passable to kmalloc_node(), this is probably why additional hacks had to be added elsewhere. Other than that, concurrent kmem_cache_create() is protected by cache_chain_mutex. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>