trace_block_sleeprq9
Waiting to get a free request entry in queue for block io operation
Usage
void trace_block_sleeprq(struct request_queue * q, struct bio * bio, int rw);
Arguments
q
queue for operation
bio
pending block IO operation
rw
low bit indicates a read (0) or a write (1)
Overview
In the case where a request struct cannot be provided for queue q the process needs to wait for an request struct to become available. This tracepoint event is generated each time the process goes to sleep waiting for request struct become available.
Releases
3 releases since Debian 7 (Wheezy); the text changed 2 times.