JBD2_CONTROL_BLOCKS_SHIFT 632 fs/jbd2/transaction.c if (wanted + (wanted >> JBD2_CONTROL_BLOCKS_SHIFT) > JBD2_CONTROL_BLOCKS_SHIFT 1576 include/linux/jbd2.h return nblocks + (nblocks >> JBD2_CONTROL_BLOCKS_SHIFT); JBD2_CONTROL_BLOCKS_SHIFT 1592 include/linux/jbd2.h free -= committing + (committing >> JBD2_CONTROL_BLOCKS_SHIFT);