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Commit 80fe2b19 authored by Fred Isaman's avatar Fred Isaman Committed by Trond Myklebust
Browse files

NFSv4.1: lseg documentation 



Signed-off-by: default avatarFred Isaman <iisaman@netapp.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 568e8c49

Documentation/filesystems/nfs/pnfs.txt

+7 −0
Original line number Diff line number Diff line
@@ -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.