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Subject[patch 4/7] fs: preserve inode dirty bits on failed metadata writeback
Otherwise we think the inode is clean even if syncing failed.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>

Index: linux-2.6/fs/fs-writeback.c
===================================================================
--- linux-2.6.orig/fs/fs-writeback.c 2010-11-23 22:28:22.000000000 +1100
+++ linux-2.6/fs/fs-writeback.c 2010-11-23 22:57:40.000000000 +1100
@@ -447,15 +447,25 @@ writeback_single_inode(struct inode *ino
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);
+ int err;
+
+ spin_unlock(&inode_lock);
+ err = write_inode(inode, wbc);
if (ret == 0)
ret = err;
+ spin_lock(&inode_lock);
+ if (err) {
+ /*
+ * Inode writeout failed, restore inode metadata
+ * dirty bits.
+ */
+ inode->i_state |= dirty &
+ (I_DIRTY_SYNC | I_DIRTY_DATASYNC);
+ }
}

- spin_lock(&inode_lock);
if (!inode_writeback_end(inode)) {
if (wbc->nr_to_write <= 0) {
/*



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