From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757604AbZIPN3A (ORCPT ); Wed, 16 Sep 2009 09:29:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757162AbZIPN1y (ORCPT ); Wed, 16 Sep 2009 09:27:54 -0400 Received: from brick.kernel.dk ([93.163.65.50]:57946 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752211AbZIPNYt (ORCPT ); Wed, 16 Sep 2009 09:24:49 -0400 From: Jens Axboe To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: chris.mason@oracle.com, hch@infradead.org, tytso@mit.edu, akpm@linux-foundation.org, jack@suse.cz, trond.myklebust@fys.uio.no, Jens Axboe Subject: [PATCH 10/16] writeback: splice dirty inode entries to default bdi on bdi_destroy() Date: Wed, 16 Sep 2009 15:24:48 +0200 Message-Id: <1253107494-20160-11-git-send-email-jens.axboe@oracle.com> X-Mailer: git-send-email 1.6.4.1.207.g68ea In-Reply-To: <1253107494-20160-1-git-send-email-jens.axboe@oracle.com> References: <1253107494-20160-1-git-send-email-jens.axboe@oracle.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We cannot safely ensure that the inodes are all gone at this point in time, and we must not destroy this bdi with inodes having off it. So just splice our entries to the default bdi since that one will always persist. Signed-off-by: Jens Axboe --- mm/backing-dev.c | 14 +++++++++++++- 1 files changed, 13 insertions(+), 1 deletions(-) diff --git a/mm/backing-dev.c b/mm/backing-dev.c index fd93566..3d3accb 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -668,7 +668,19 @@ void bdi_destroy(struct backing_dev_info *bdi) { int i; - WARN_ON(bdi_has_dirty_io(bdi)); + /* + * Splice our entries to the default_backing_dev_info, if this + * bdi disappears + */ + if (bdi_has_dirty_io(bdi)) { + struct bdi_writeback *dst = &default_backing_dev_info.wb; + + spin_lock(&inode_lock); + list_splice(&bdi->wb.b_dirty, &dst->b_dirty); + list_splice(&bdi->wb.b_io, &dst->b_io); + list_splice(&bdi->wb.b_more_io, &dst->b_more_io); + spin_unlock(&inode_lock); + } bdi_unregister(bdi); -- 1.6.4.1.207.g68ea