Tejun posted a series last week that moves node_to_bdi back inline to -fsdevel. Can you apply patches 1-18 of the series "[PATCHSET 1/3 v3 block/for-4.1/core] writeback: cgroup writeback support" and see if that helps your benchmark? -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html