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| author | Stefan Roesch <shr@devkernel.io> | 2022-11-18 16:52:12 -0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-11-30 15:59:06 -0800 |
| commit | 54790f30fea74247e2f38b4a632ee3dc2fe42d86 (patch) | |
| tree | c8fe697f7a7ffab55ebdba5c1eb9d78becaa40a2 | |
| parent | bca52dcbadc583f4db6435599c44a79f97293f06 (diff) | |
mm: document /sys/class/bdi/<bdi>/max_ratio_fine knob
This documents the new /sys/class/bdi/<bdi>/max_ratio_fine knob.
[akpm@linux-foundation.org: fix htmldocs warnings]
Link: https://lkml.kernel.org/r/20221119005215.3052436-18-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>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-bdi | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-bdi b/Documentation/ABI/testing/sysfs-class-bdi index a9a2f588a2b7..e9c584db316f 100644 --- a/Documentation/ABI/testing/sysfs-class-bdi +++ b/Documentation/ABI/testing/sysfs-class-bdi @@ -57,6 +57,19 @@ Description: (read-write) +What: /sys/class/bdi/<bdi>/max_ratio_fine +Date: November 2022 +Contact: Stefan Roesch <shr@devkernel.io> +Description: + Allows limiting a particular device to use not more than the + given value of the write-back cache. The value is given as part + of 1 million. This is useful in situations where we want to avoid + one device taking all or most of the write-back cache. For example + in case of an NFS mount that is prone to get stuck, or a FUSE mount + which cannot be trusted to play fair. + + (read-write) + What: /sys/class/bdi/<bdi>/min_bytes Date: October 2022 Contact: Stefan Roesch <shr@devkernel.io> |