From: Gao Xiang Date: Thu, 22 Jan 2026 02:52:52 +0000 (+0800) Subject: erofs: add missing documentation about `directio` mount option X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a221a737406501c9036d00667095d61317d50d7f;p=thirdparty%2Fkernel%2Flinux.git erofs: add missing documentation about `directio` mount option Document the `directio` mount option for file-backed mounts, because recent users need this and this mount option has been available since commit 6422cde1b0d5 ("erofs: use buffered I/O for file-backed mounts by default") without proper documentation. Reported-by: Yuxuan Liu Signed-off-by: Gao Xiang --- diff --git a/Documentation/filesystems/erofs.rst b/Documentation/filesystems/erofs.rst index 08194f194b942..96101c3fe53a5 100644 --- a/Documentation/filesystems/erofs.rst +++ b/Documentation/filesystems/erofs.rst @@ -125,6 +125,8 @@ dax={always,never} Use direct access (no page cache). See Documentation/filesystems/dax.rst. dax A legacy option which is an alias for ``dax=always``. device=%s Specify a path to an extra device to be used together. +directio (For file-backed mounts) Use direct I/O to access backing + files, and asynchronous I/O will be enabled if supported. fsid=%s Specify a filesystem image ID for Fscache back-end. domain_id=%s Specify a domain ID in fscache mode so that different images with the same blobs under a given domain ID can share storage.