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doc: fuse: Add max_background and congestion_threshold

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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@gmail.com>
Signed-off-by: Chen Linxuan <chenlinxuan@uniontech.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Chen Linxuan
2025-06-10 10:11:25 +08:00
committed by Miklos Szeredi
parent 7a37f55af7
commit e49a6828ab
1 changed files with 14 additions and 0 deletions
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14
Documentation/filesystems/fuse.rst
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@@ -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