On Tue, Nov 22, 2011 at 05:26:05PM -0800, David Rientjes wrote: > Calling alloc_pages_exact_node() means the allocation only passes the > zonelist of a single node into the page allocator. If that node isn't > online, it's zonelist may never have been initialized causing a strange > oops that may not immediately be clear. > > I recently debugged an issue where node 0 wasn't online and an allocator > was passing 0 to alloc_pages_exact_node() and it resulted in a NULL > pointer on zonelist->_zoneref. If CONFIG_DEBUG_VM is enabled, though, it > would be nice to catch this a bit earlier. > > Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx> Acked-by: Mel Gorman <mgorman@xxxxxxx> Out of curiousity, who was passing in the ID of an offline node to alloc_pages_exact_node() ? -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>