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| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-bdi | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-bdi b/Documentation/ABI/testing/sysfs-class-bdi index e9c584db316f..0d2abd88a18c 100644 --- a/Documentation/ABI/testing/sysfs-class-bdi +++ b/Documentation/ABI/testing/sysfs-class-bdi @@ -44,6 +44,21 @@ Description: (read-write) +What: /sys/class/bdi/<bdi>/min_ratio_fine +Date: November 2022 +Contact: Stefan Roesch <shr@devkernel.io> +Description: + Under normal circumstances each device is given a part of the + total write-back cache that relates to its current average + writeout speed in relation to the other devices. + + The 'min_ratio_fine' parameter allows assigning a minimum reserve + of the write-back cache to a particular device. The value is + expressed as part of 1 million. For example, this is useful for + providing a minimum QoS. + + (read-write) + What: /sys/class/bdi/<bdi>/max_ratio Date: January 2008 Contact: Peter Zijlstra <a.p.zijlstra@chello.nl> |