As I preparing patches adding selftests for fusectl, I notice that documentation of max_background and congestion_threshold is missing. This patch add some descriptions about these two files. Cc: Amir Goldstein <amir73il@xxxxxxxxx> Signed-off-by: Chen Linxuan <chenlinxuan@xxxxxxxxxxxxx> --- Documentation/filesystems/fuse.rst | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/Documentation/filesystems/fuse.rst b/Documentation/filesystems/fuse.rst index 1e31e87aee68c..c589316c8bb35 100644 --- a/Documentation/filesystems/fuse.rst +++ b/Documentation/filesystems/fuse.rst @@ -129,6 +129,20 @@ For each connection the following files exist within this directory: connection. This means that all waiting requests will be aborted an error returned for all aborted and new requests. + max_background + The maximum number of background requests that can be outstanding + at a time. When the number of background requests reaches this limit, + further requests will be blocked until some are completed, potentially + causing I/O operations to stall. + + congestion_threshold + The threshold of background requests at which the kernel considers + the filesystem to be congested. When the number of background requests + exceeds this value, the kernel will skip asynchronous readahead + operations, reducing read-ahead optimizations but preserving essential + I/O, as well as suspending non-synchronous writeback operations + (WB_SYNC_NONE), delaying page cache flushing to the filesystem. + Only the owner of the mount may read or write these files. Interrupting filesystem operations -- 2.43.0
