ceph: new mount option to disable usage of copy-from op

[sfrench/cifs-2.6.git] / Documentation / filesystems / ceph.txt

diff --git a/Documentation/filesystems/ceph.txt b/Documentation/filesystems/ceph.txt
index 8bf62240e10d35a7dc99fac14f86afeb14313490..1177052701e138e22d63319e8c96001077b90660 100644 (file)
--- a/Documentation/filesystems/ceph.txt
+++ b/Documentation/filesystems/ceph.txt
@@ -151,6 +151,11 @@ Mount Options
         Report overall filesystem usage in statfs instead of using the root
         directory quota.
 
         Report overall filesystem usage in statfs instead of using the root
         directory quota.
 

+  nocopyfrom
+        Don't use the RADOS 'copy-from' operation to perform remote object
+        copies.  Currently, it's only used in copy_file_range, which will revert
+        to the default VFS implementation if this option is used.
+

 More Information
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 More Information
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