From patchwork Wed Jan 7 00:28:43 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Haynes X-Patchwork-Id: 5578371 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 8BF6C9F74C for ; Wed, 7 Jan 2015 00:30:05 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BCA8A2010B for ; Wed, 7 Jan 2015 00:30:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CC2BE20251 for ; Wed, 7 Jan 2015 00:30:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751523AbbAGA35 (ORCPT ); Tue, 6 Jan 2015 19:29:57 -0500 Received: from mail-pa0-f53.google.com ([209.85.220.53]:58779 "EHLO mail-pa0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756057AbbAGA3v (ORCPT ); Tue, 6 Jan 2015 19:29:51 -0500 Received: by mail-pa0-f53.google.com with SMTP id kq14so1045874pab.12 for ; Tue, 06 Jan 2015 16:29:51 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=2Vh5/7oC1Op7NYucu6Ochpy0OYzTsAKrz9otdKCFbMU=; b=JHKmYhiZbj9ubT064sALgba9IJ5AYMbPO01xz6+AobKZGcip5PjlmWhvXnJwKK/u9V yu25FNzsp1Nb/Iu53tw2A3iFNvRugtn+2oSJ3I6dhIHFubOFd1bpQSwqDmD6xIRCwSUG kIGkZPBVZICZ2hNaav84+uVH3orlYBQ6tUbw71n9xNXQUpcoVd1vdwLM2ep42QXWWILr KNRlKFIXth81HY9tfkR2TTQEijXAs7Cx6ZyHnliNU83ZdvXTY+iTT6h8D92Nz9C50Ho7 7phRUwJNIYRjqe4Yk1UXehg5o0tIhGj7rLuvcxh30WmdcHTdNNn8pD8egvzyFNk++5t+ qrBQ== X-Gm-Message-State: ALoCoQnTkkPLpkCkUASvbUfrJo9D8fz700IyD+2xYbn9uIBCBvGRIFWb3YdX6TjhvY5Mh/Lbd8aZ X-Received: by 10.68.69.8 with SMTP id a8mr164062pbu.23.1420590591247; Tue, 06 Jan 2015 16:29:51 -0800 (PST) Received: from localhost.localdomain ([50.242.95.105]) by mx.google.com with ESMTPSA id wi15sm53763pac.21.2015.01.06.16.29.50 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 06 Jan 2015 16:29:50 -0800 (PST) From: Tom Haynes X-Google-Original-From: Tom Haynes To: Trond Myklebust Cc: Linux NFS Mailing list Subject: [PATCH v3 38/49] nfs41: add a debug warning if we destroy an unempty layout Date: Tue, 6 Jan 2015 16:28:43 -0800 Message-Id: <1420590534-84063-39-git-send-email-loghyr@primarydata.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1420590534-84063-1-git-send-email-loghyr@primarydata.com> References: <1420590534-84063-1-git-send-email-loghyr@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Peng Tao So that we can detect the case if some layout segments are still pinned which is surely a bug that we need to fix. Signed-off-by: Peng Tao --- fs/nfs/pnfs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 5f7c422..e123cfc 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -242,6 +242,8 @@ pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) struct inode *inode = lo->plh_inode; if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { + if (!list_empty(&lo->plh_segs)) + WARN_ONCE(1, "NFS: BUG unfreed layout segments.\n"); pnfs_detach_layout_hdr(lo); spin_unlock(&inode->i_lock); pnfs_free_layout_hdr(lo);