From: Dominique Martinet <dominique.martinet@xxxxxx> Regular files opened with O_NONBLOCK allow read to return after a single round-trip with the server instead of trying to fill buffer. Add a few lines in 9p documentation to describe that. Signed-off-by: Dominique Martinet <dominique.martinet@xxxxxx> --- Documentation/filesystems/9p.txt | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/Documentation/filesystems/9p.txt b/Documentation/filesystems/9p.txt index fec7144e817c..3fb780ffdf23 100644 --- a/Documentation/filesystems/9p.txt +++ b/Documentation/filesystems/9p.txt @@ -133,6 +133,16 @@ OPTIONS cache tags for existing cache sessions can be listed at /sys/fs/9p/caches. (applies only to cache=fscache) +BEHAVIOR +======== + +This section aims at describing 9p 'quirks' that can be different +from a local filesystem behaviors. + + - Setting O_NONBLOCK on a file will make client reads return as early + as the server returns some data instead of trying to fill the read + buffer with the requested amount of bytes or end of file is reached. + RESOURCES ========= -- 2.26.0
