Hi Wu, if you're queueing up writeback changes can you look into splitting inode_wb_list_lock as it was done in earlier versions of the inode scalability patches? Especially if we don't get the I/O less balance_dirty_pages in ASAP it'll at least allows us to scale the busy waiting for the list manipulationes to one CPU per BDI. -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>