blk_stop_queue9
Stop a queue
Usage
void blk_stop_queue(struct request_queue * q);
Arguments
q
The struct request_queue in question
Overview
The Linux block layer assumes that a block driver will consume all entries on the request queue when the request_fn strategy is called. Often this will not happen, because of hardware limitations (queue depth settings). If a device driver gets a 'queue full' response, or if it simply chooses not to queue more I/O at one point, it can call this function to prevent the request_fn from being called until the driver has signalled it's ready to go again. This happens by calling blk_start_queue to restart queue operations. Queue lock must be held.
Releases
6 releases since Debian 4.0 (Etch); the text changed 5 times.