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trace_block_sleeprq
Langue: en
Version: October 2010 (fedora - 01/12/10)
Section: 9 (Appels noyau Linux)
NAME
trace_block_sleeprq - waiting to get a free request entry in queue for block IO operationSYNOPSIS
- 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.
AUTHORS
Jason Baron <jbaron@redhat.com>
- Author.
William Cohen <wcohen@redhat.com>
- Author.
COPYRIGHT
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