From patchwork Fri Sep 21 20:50:11 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Trond Myklebust X-Patchwork-Id: 1493421 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id D15A13FE65 for ; Fri, 21 Sep 2012 20:52:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757872Ab2IUUwW (ORCPT ); Fri, 21 Sep 2012 16:52:22 -0400 Received: from mx2.netapp.com ([216.240.18.37]:45426 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756122Ab2IUUwV (ORCPT ); Fri, 21 Sep 2012 16:52:21 -0400 X-IronPort-AV: E=Sophos;i="4.80,464,1344236400"; d="scan'208";a="692516245" Received: from smtp1.corp.netapp.com ([10.57.156.124]) by mx2-out.netapp.com with ESMTP; 21 Sep 2012 13:52:21 -0700 Received: from lade.trondhjem.org.com (lade.trondhjem.org [10.63.228.34] (may be forged)) by smtp1.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id q8LKoiBj029417; Fri, 21 Sep 2012 13:52:17 -0700 (PDT) From: Trond Myklebust To: linux-nfs@vger.kernel.org Subject: [PATCH v2 16/26] NFSv4.1: Remove redundant reference to the pnfs_layout_hdr Date: Fri, 21 Sep 2012 16:50:11 -0400 Message-Id: <1348260621-10294-16-git-send-email-Trond.Myklebust@netapp.com> X-Mailer: git-send-email 1.7.11.4 In-Reply-To: <1348260621-10294-15-git-send-email-Trond.Myklebust@netapp.com> References: <1348260621-10294-1-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-2-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-3-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-4-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-5-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-6-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-7-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-8-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-9-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-10-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-11-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-12-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-13-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-14-git-send-email-Trond.Myklebust@netapp.com> <1348260621-10294-15-git-send-email-Trond.Myklebust@netapp.com> Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Each layout segment already holds a reference to the pnfs_layout_hdr, so there is no need to hold an extra reference that is released once the last layout segment is freed. Signed-off-by: Trond Myklebust --- fs/nfs/pnfs.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 142d0f4..767c748 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -306,11 +306,8 @@ pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); list_del_init(&lseg->pls_list); - if (list_empty(&lo->plh_segs)) { + if (list_empty(&lo->plh_segs)) set_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags); - /* Matched by initial refcount set in alloc_init_layout_hdr */ - pnfs_put_layout_hdr_locked(lo); - } rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); } @@ -443,8 +440,7 @@ pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, dprintk("%s:Begin lo %p\n", __func__, lo); if (list_empty(&lo->plh_segs)) { - if (!test_and_set_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags)) - pnfs_put_layout_hdr_locked(lo); + set_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags); return 0; } list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) @@ -1102,7 +1098,6 @@ pnfs_update_layout(struct inode *ino, goto out_unlock; atomic_inc(&lo->plh_outstanding); - pnfs_get_layout_hdr(lo); if (list_empty(&lo->plh_segs)) first = true;