Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759734AbZFYKpn (ORCPT ); Thu, 25 Jun 2009 06:45:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756398AbZFYKml (ORCPT ); Thu, 25 Jun 2009 06:42:41 -0400 Received: from brick.kernel.dk ([93.163.65.50]:59782 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753091AbZFYKmP (ORCPT ); Thu, 25 Jun 2009 06:42:15 -0400 From: Jens Axboe To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: chris.mason@oracle.com, david@fromorbit.com, hch@infradead.org, akpm@linux-foundation.org, jack@suse.cz, yanmin_zhang@linux.intel.com, richard@rsk.demon.co.uk, damien.wyart@free.fr, fweisbec@gmail.com, Alan.Brunelle@hp.com, Jens Axboe Subject: [PATCH 09/10] writeback: check for registered bdi in flusher add and inode dirty Date: Thu, 25 Jun 2009 12:42:02 +0200 Message-Id: <1245926523-21959-10-git-send-email-jens.axboe@oracle.com> X-Mailer: git-send-email 1.6.3.rc0.1.gf800 In-Reply-To: <1245926523-21959-1-git-send-email-jens.axboe@oracle.com> References: <1245926523-21959-1-git-send-email-jens.axboe@oracle.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2344 Lines: 72 Also a debugging aid. We want to catch dirty inodes being added to backing devices that don't do writeback. Signed-off-by: Jens Axboe --- fs/fs-writeback.c | 7 +++++++ include/linux/backing-dev.h | 1 + mm/backing-dev.c | 6 ++++++ 3 files changed, 14 insertions(+), 0 deletions(-) diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 796b243..dfb4767 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -643,6 +643,13 @@ void __mark_inode_dirty(struct inode *inode, int flags) */ if (!was_dirty) { struct bdi_writeback *wb = inode_get_wb(inode); + struct backing_dev_info *bdi = wb->bdi; + + if (bdi_cap_writeback_dirty(bdi) && + !test_bit(BDI_registered, &bdi->state)) { + WARN_ON(1); + printk("bdi-%s not registered\n", bdi->name); + } inode->dirtied_when = jiffies; list_move(&inode->i_list, &wb->b_dirty); diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 9d2efc5..e623c57 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -31,6 +31,7 @@ enum bdi_state { BDI_wblist_lock, /* bdi->wb_list now needs locking */ BDI_async_congested, /* The async (write) queue is getting full */ BDI_sync_congested, /* The sync queue is getting full */ + BDI_registered, /* bdi_register() was done */ BDI_unused, /* Available bits start here */ }; diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 6cdd9e5..75e6c47 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -569,6 +569,11 @@ static void bdi_add_one_flusher_task(struct backing_dev_info *bdi, if (!bdi_cap_writeback_dirty(bdi)) return; + if (WARN_ON(!test_bit(BDI_registered, &bdi->state))) { + printk("bdi %p/%s is not registered!\n", bdi, bdi->name); + return; + } + /* * Check with the helper whether to proceed adding a task. Will only * abort if we two or more simultanous calls to @@ -678,6 +683,7 @@ remove_err: } bdi_debug_register(bdi, dev_name(dev)); + set_bit(BDI_registered, &bdi->state); exit: return ret; } -- 1.6.3.rc0.1.gf800 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/