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| author | Fred Isaman <iisaman@netapp.com> | 2011-02-28 20:34:23 -0500 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-03-11 15:38:43 -0500 |
| commit | 80fe2b192dbc53261e385dc26d90f5195f1c62e7 (patch) | |
| tree | 853c607e49f66dcf62012572b765976a2dc40ca8 /Documentation/filesystems | |
| parent | 568e8c494ded95a28c5dd8b79b4d3ffb95b6d845 (diff) | |
NFSv4.1: lseg documentation
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'Documentation/filesystems')
| -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 | |||
| 46 | file driver devices refer to data servers, which are kept in a module | 46 | file driver devices refer to data servers, which are kept in a module |
| 47 | level cache. Its reference is held over the lifetime of the deviceid | 47 | level cache. Its reference is held over the lifetime of the deviceid |
| 48 | pointing to it. | 48 | pointing to it. |
| 49 | |||
| 50 | lseg | ||
| 51 | ---- | ||
| 52 | lseg maintains an extra reference corresponding to the NFS_LSEG_VALID | ||
| 53 | bit which holds it in the pnfs_layout_hdr's list. When the final lseg | ||
| 54 | is removed from the pnfs_layout_hdr's list, the NFS_LAYOUT_DESTROYED | ||
| 55 | bit is set, preventing any new lsegs from being added. | ||