From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.netapp.com ([216.240.18.37]:39366 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757129Ab1CAR36 (ORCPT ); Tue, 1 Mar 2011 12:29:58 -0500 From: andros@netapp.com To: trond.myklebust@netapp.com Cc: linux-nfs@vger.kernel.org, Fred Isaman Subject: [PATCH pNFS wave 3 Version 3 18/18] NFSv4.1: lseg documentation Date: Mon, 28 Feb 2011 20:34:23 -0500 Message-Id: <1298943263-2886-19-git-send-email-andros@netapp.com> In-Reply-To: <1298943263-2886-18-git-send-email-andros@netapp.com> References: <1298943263-2886-1-git-send-email-andros@netapp.com> <1298943263-2886-2-git-send-email-andros@netapp.com> <1298943263-2886-3-git-send-email-andros@netapp.com> <1298943263-2886-4-git-send-email-andros@netapp.com> <1298943263-2886-5-git-send-email-andros@netapp.com> <1298943263-2886-6-git-send-email-andros@netapp.com> <1298943263-2886-7-git-send-email-andros@netapp.com> <1298943263-2886-8-git-send-email-andros@netapp.com> <1298943263-2886-9-git-send-email-andros@netapp.com> <1298943263-2886-10-git-send-email-andros@netapp.com> <1298943263-2886-11-git-send-email-andros@netapp.com> <1298943263-2886-12-git-send-email-andros@netapp.com> <1298943263-2886-13-git-send-email-andros@netapp.com> <1298943263-2886-14-git-send-email-andros@netapp.com> <1298943263-2886-15-git-send-email-andros@netapp.com> <1298943263-2886-16-git-send-email-andros@netapp.com> <1298943263-2886-17-git-send-email-andros@netapp.com> <1298943263-2886-18-git-send-email-andros@netapp.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Content-Type: text/plain MIME-Version: 1.0 From: Fred Isaman Signed-off-by: Fred Isaman --- 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 bc0b9cf..983e14a 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. -- 1.6.6