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-rw-r--r--Documentation/filesystems/9p.rst10
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/filesystems/9p.rst b/Documentation/filesystems/9p.rst
index f054d1c45e86..671fef39a802 100644
--- a/Documentation/filesystems/9p.rst
+++ b/Documentation/filesystems/9p.rst
@@ -158,6 +158,16 @@ Options
/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
=========