I have a slow device and I want to limit file system write cache for that device. Therefore I have already changed setting
However that limit is only effective if half of
vm.dirty_background_ratio is in use already. So it will still fill half of the dirty pages when writing large amounts of data. I want
max_ratio to be effective always. I found out there is another setting "strictlimit", but I can't find out how to toggle that option. The file
/sys/devices/virtual/bdi/x:y/strictlimit which is mentioned on some places is missing on my system (Debian 8).
How do I set option "strictlimit" to active?