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SUNRPC: Ensure that we can trace waitqueues when !defined(CONFIG_SYSCTL)

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The tracepoint code relies on the queue->name being defined in order to
be able to display the name of the waitqueue on which an RPC task is
sleeping.

Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
This commit is contained in:
Trond Myklebust 2012-02-08 22:01:15 -05:00
parent 685f50f918
commit 2f09c24216
3 changed files with 17 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

3
include/linux/sunrpc/debug.h
View file

@ -34,6 +34,9 @@
#ifdef CONFIG_SYSCTL #ifdef CONFIG_SYSCTL
#define RPC_DEBUG #define RPC_DEBUG
#endif #endif
#ifdef CONFIG_TRACEPOINTS
#define RPC_TRACEPOINTS
#endif
/* #define RPC_PROFILE */ /* #define RPC_PROFILE */
/* /*

15
include/linux/sunrpc/sched.h
View file

@ -195,7 +195,7 @@ struct rpc_wait_queue {
unsigned char nr; /* # tasks remaining for cookie */ unsigned char nr; /* # tasks remaining for cookie */
unsigned short qlen; /* total # tasks waiting in queue */ unsigned short qlen; /* total # tasks waiting in queue */
struct rpc_timer timer_list; struct rpc_timer timer_list;
#ifdef RPC_DEBUG #if defined(RPC_DEBUG) || defined(RPC_TRACEPOINTS)
const char * name; const char * name;
#endif #endif
}; };
@ -270,11 +270,22 @@ static inline int rpc_task_has_priority(struct rpc_task *task, unsigned char pri
return (task->tk_priority + RPC_PRIORITY_LOW == prio); return (task->tk_priority + RPC_PRIORITY_LOW == prio);
} }
#ifdef RPC_DEBUG #if defined(RPC_DEBUG) || defined (RPC_TRACEPOINTS)
static inline const char * rpc_qname(const struct rpc_wait_queue *q) static inline const char * rpc_qname(const struct rpc_wait_queue *q)
{ {
return ((q && q->name) ? q->name : "unknown"); return ((q && q->name) ? q->name : "unknown");
} }
static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q,
const char *name)
{
q->name = name;
}
#else
static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q,
const char *name)
{
}
#endif #endif
#endif /* _LINUX_SUNRPC_SCHED_H_ */ #endif /* _LINUX_SUNRPC_SCHED_H_ */

4
net/sunrpc/sched.c
View file

@ -208,9 +208,7 @@ static void __rpc_init_priority_wait_queue(struct rpc_wait_queue *queue, const c
queue->qlen = 0; queue->qlen = 0;
setup_timer(&queue->timer_list.timer, __rpc_queue_timer_fn, (unsigned long)queue); setup_timer(&queue->timer_list.timer, __rpc_queue_timer_fn, (unsigned long)queue);
INIT_LIST_HEAD(&queue->timer_list.list); INIT_LIST_HEAD(&queue->timer_list.list);
#ifdef RPC_DEBUG rpc_assign_waitqueue_name(queue, qname);
queue->name = qname;
#endif
} }
void rpc_init_priority_wait_queue(struct rpc_wait_queue *queue, const char *qname) void rpc_init_priority_wait_queue(struct rpc_wait_queue *queue, const char *qname)