On Fri, 2011-04-29 at 00:40 +0200, Jan Kara wrote: > James in the meantime identified that cgroups are somehow involved. > Are you > using systemd by any chance? Maybe cgroup IO throttling screws us? Yes, this is a FC15 system with systemd as the default. See related post: it looks like disabling the memory controller is what makes this go away. James -- 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>