Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-pd0-f177.google.com ([209.85.192.177]:57642 "EHLO mail-pd0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754432AbbAVXiK (ORCPT ); Thu, 22 Jan 2015 18:38:10 -0500 Received: by mail-pd0-f177.google.com with SMTP id y13so4598255pdi.8 for ; Thu, 22 Jan 2015 15:38:10 -0800 (PST) From: Tom Haynes To: Trond Myklebust Cc: Linux NFS Mailing list Subject: [PATCH v5 38/51] nfs41: add a debug warning if we destroy an unempty layout Date: Thu, 22 Jan 2015 15:36:10 -0800 Message-Id: <1421969783-92997-39-git-send-email-loghyr@primarydata.com> In-Reply-To: <1421969783-92997-1-git-send-email-loghyr@primarydata.com> References: <1421969783-92997-1-git-send-email-loghyr@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: 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); -- 1.9.3