diff options
| author | Stefan Roesch | 2022-11-18 16:51:58 -0800 |
|---|---|---|
| committer | Andrew Morton | 2022-11-30 15:59:03 -0800 |
| commit | 16b837eb84e6948f92411eb32e97a05f89733ddc (patch) | |
| tree | 95bf7ce047360685de5dc9d477cc0d7f88df76cf /Documentation/ABI | |
| parent | 27bbe9d48d4e298864e18b39f091342c68b81637 (diff) | |
mm: document /sys/class/bdi/<bdi>/strict_limit knob
This documents the new /sys/class/bdi/<bdi>/strict_limit knob.
Link: https://lkml.kernel.org/r/20221119005215.3052436-4-shr@devkernel.io
Signed-off-by: Stefan Roesch <shr@devkernel.io>
Cc: Chris Mason <clm@meta.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-bdi | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-bdi b/Documentation/ABI/testing/sysfs-class-bdi index 6d2a2fc189dd..68b5d4018c2f 100644 --- a/Documentation/ABI/testing/sysfs-class-bdi +++ b/Documentation/ABI/testing/sysfs-class-bdi @@ -56,6 +56,17 @@ Description: be trusted to play fair. (read-write) +What: /sys/class/bdi/<bdi>/strict_limit +Date: October 2022 +Contact: Stefan Roesch <shr@devkernel.io> +Description: + Forces per-BDI checks for the share of given device in the write-back + cache even before the global background dirty limit is reached. This + is useful in situations where the global limit is much higher than + affordable for given relatively slow (or untrusted) device. Turning + strictlimit on has no visible effect if max_ratio is equal to 100%. + + (read-write) What: /sys/class/bdi/<bdi>/stable_pages_required Date: January 2008 Contact: Peter Zijlstra <a.p.zijlstra@chello.nl> |