Query: blk_lld_busy
OS: centos
Section: 9
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
BLK_LLD_BUSY(9) Block Devices BLK_LLD_BUSY(9)NAMEblk_lld_busy - Check if underlying low-level drivers of a device are busySYNOPSISint blk_lld_busy(struct request_queue * q);ARGUMENTSq the queue of the device being checkedDESCRIPTIONCheck if underlying low-level drivers of a device are busy. If the drivers want to export their busy state, they must set own exporting function using blk_queue_lld_busy first. Basically, this function is used only by request stacking drivers to stop dispatching requests to underlying devices when underlying devices are busy. This behavior helps more I/O merging on the queue of the request stacking driver and prevents I/O throughput regression on burst I/O load.RETURN0 - Not busy (The request stacking driver should dispatch request) 1 - Busy (The request stacking driver should stop dispatching request)COPYRIGHTKernel Hackers Manual 3.10 June 2014 BLK_LLD_BUSY(9)
Related Man Pages |
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blk_init_queue(9) - centos |
drv_usecwait(9f) - opensolaris |
drv_usecwait(9f) - posix |
drv_usecwait(9f) - v7 |
drv_usecwait(9f) - minix |
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