• Dave Chinner's avatar
    xfs: Pull EFI/EFD handling out from under the AIL lock · b199c8a4
    Dave Chinner authored
    EFI/EFD interactions are protected from races by the AIL lock. They
    are the only type of log items that require the the AIL lock to
    serialise internal state, so they need to be separated from the AIL
    lock before we can do bulk insert operations on the AIL.
    
    To acheive this, convert the counter of the number of extents in the
    EFI to an atomic so it can be safely manipulated by EFD processing
    without locks. Also, convert the EFI state flag manipulations to use
    atomic bit operations so no locks are needed to record state
    changes. Finally, use the state bits to determine when it is safe to
    free the EFI and clean up the code to do this neatly.
    Signed-off-by: default avatarDave Chinner <dchinner@redhat.com>
    Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
    b199c8a4
xfs_trans_extfree.c 3.53 KB