SYNOPSIS
- 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)
DESCRIPTION
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.
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