• Christoph Hellwig's avatar
    xfs: format log items write directly into the linear CIL buffer · bde7cff6
    Christoph Hellwig authored
    
    
    Instead of setting up pointers to memory locations in iop_format which then
    get copied into the CIL linear buffer after return move the copy into
    the individual inode items.  This avoids the need to always have a memory
    block in the exact same layout that gets written into the log around, and
    allow the log items to be much more flexible in their in-memory layouts.
    
    The only caveat is that we need to properly align the data for each
    iovec so that don't have structures misaligned in subsequent iovecs.
    
    Note that all log item format routines now need to be careful to modify
    the copy of the item that was placed into the CIL after calls to
    xlog_copy_iovec instead of the in-memory copy.
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
    Signed-off-by: default avatarDave Chinner <david@fromorbit.com>
    bde7cff6
xfs_trans.h 8.78 KB