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| author | Fred Isaman <iisaman@netapp.com> | 2011-03-01 02:34:23 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-03-11 21:38:43 +0100 |
| commit | 80fe2b192dbc53261e385dc26d90f5195f1c62e7 (patch) | |
| tree | 853c607e49f66dcf62012572b765976a2dc40ca8 | |
| parent | NFSv4.1: turn off pNFS on ds connection failure (diff) | |
| download | linux-80fe2b192dbc53261e385dc26d90f5195f1c62e7.tar.xz linux-80fe2b192dbc53261e385dc26d90f5195f1c62e7.zip | |
NFSv4.1: lseg documentation
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| -rw-r--r-- | Documentation/filesystems/nfs/pnfs.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/filesystems/nfs/pnfs.txt b/Documentation/filesystems/nfs/pnfs.txt index bc0b9cfe095b..983e14abe7e9 100644 --- a/Documentation/filesystems/nfs/pnfs.txt +++ b/Documentation/filesystems/nfs/pnfs.txt @@ -46,3 +46,10 @@ data server cache file driver devices refer to data servers, which are kept in a module level cache. Its reference is held over the lifetime of the deviceid pointing to it. + +lseg +---- +lseg maintains an extra reference corresponding to the NFS_LSEG_VALID +bit which holds it in the pnfs_layout_hdr's list. When the final lseg +is removed from the pnfs_layout_hdr's list, the NFS_LAYOUT_DESTROYED +bit is set, preventing any new lsegs from being added. |