BLK_SYNC_QUEUE(9) Block Devices BLK_SYNC_QUEUE(9)
NAME
blk_sync_queue - cancel any pending callbacks on a queue
SYNOPSIS
void blk_sync_queue(struct request_queue * q);
ARGUMENTS
q
the queue
DESCRIPTION
The block layer may perform asynchronous callback activity on a queue, such as calling the unplug function after a timeout. A block device
may call blk_sync_queue to ensure that any such activity is cancelled, thus allowing it to release resources that the callbacks might use.
The caller must already have made sure that its ->make_request_fn will not re-add plugging prior to calling this function.
This function does not cancel any asynchronous activity arising out of elevator or throttling code. That would require elevaotor_exit and
blkcg_exit_queue to be called with queue lock initialized.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 BLK_SYNC_QUEUE(9)
