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    Subject[PATCH 04/11] writeback: requeue_io_wait() on locked inode
    Convert to requeue_io_wait() for case:

    inode is locked

    Cc: Michael Rubin <mrubin@google.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn>
    ---
    fs/fs-writeback.c | 7 ++-----
    1 file changed, 2 insertions(+), 5 deletions(-)

    --- linux-2.6.24-rc6-mm1.orig/fs/fs-writeback.c
    +++ linux-2.6.24-rc6-mm1/fs/fs-writeback.c
    @@ -322,16 +322,13 @@ __writeback_single_inode(struct inode *i
    WARN_ON(inode->i_state & I_WILL_FREE);

    if ((wbc->sync_mode != WB_SYNC_ALL) && (inode->i_state & I_SYNC)) {
    /*
    * We're skipping this inode because it's locked, and we're not
    - * doing writeback-for-data-integrity. Move it to s_more_io so
    - * that writeback can proceed with the other inodes on s_io.
    - * We'll have another go at writing back this inode when we
    - * completed a full scan of s_io.
    + * doing writeback-for-data-integrity. Recheck it after a while.
    */
    - requeue_io(inode);
    + requeue_io_wait(inode);
    return 0;
    }

    /*
    * It's a data-integrity sync. We must wait.
    --


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