From 5547e8aac6f71505d621a612de2fca0dd988b439 Mon Sep 17 00:00:00 2001 From: Dmitry Monakhov Date: Fri, 7 May 2010 13:35:44 +0400 Subject: [PATCH] writeback: Update dirty flags in two steps Filesystems with delalloc support may dirty inode during writepages. As result inode will have dirty metadata flags even after write_inode. In fact we have two dedicated functions for proper data and metadata writeback. It is reasonable to separate flags updates in two stages. https://bugzilla.kernel.org/show_bug.cgi?id=15906 Signed-off-by: Dmitry Monakhov Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe --- fs/fs-writeback.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 67db89786e7d..0f629571234f 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -460,11 +460,9 @@ writeback_single_inode(struct inode *inode, struct writeback_control *wbc) BUG_ON(inode->i_state & I_SYNC); - /* Set I_SYNC, reset I_DIRTY */ - dirty = inode->i_state & I_DIRTY; + /* Set I_SYNC, reset I_DIRTY_PAGES */ inode->i_state |= I_SYNC; - inode->i_state &= ~I_DIRTY; - + inode->i_state &= ~I_DIRTY_PAGES; spin_unlock(&inode_lock); ret = do_writepages(mapping, wbc); @@ -480,6 +478,15 @@ writeback_single_inode(struct inode *inode, struct writeback_control *wbc) ret = err; } + /* + * Some filesystems may redirty the inode during the writeback + * due to delalloc, clear dirty metadata flags right before + * write_inode() + */ + spin_lock(&inode_lock); + dirty = inode->i_state & I_DIRTY; + inode->i_state &= ~(I_DIRTY_SYNC | I_DIRTY_DATASYNC); + spin_unlock(&inode_lock); /* Don't write the inode if only I_DIRTY_PAGES was set */ if (dirty & (I_DIRTY_SYNC | I_DIRTY_DATASYNC)) { int err = write_inode(inode, wbc);