> For the case of of a heavy dirtier (dd) and concurrent light dirtiers > (some random processes), the light dirtiers won't be easily throttled. > task_dirty_limit() handles that case well. It will give light dirtiers > higher threshold than heavy dirtiers so that only the latter will be > dirty throttled. The caveat is, the real dirty throttling threshold is not exactly the value specified by vm.dirty_ratio or vm.dirty_bytes. Instead it's some value slightly lower than it. That real value differs for each process, which is a nice trick to throttle heavy dirtiers first. If I remember it right, that's invented by Peter and Andrew. Thanks, Fengguang -- 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
