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rcu: Add RCU type to callback-invocation tracing

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Add a string to the rcu_batch_start() and rcu_batch_end() trace
messages that indicates the RCU type ("rcu_sched", "rcu_bh", or
"rcu_preempt").  The trace messages for the actual invocations
themselves are not marked, as it should be clear from the
rcu_batch_start() and rcu_batch_end() events before and after.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2011-06-21 01:14:54 -07:00 • committed by Paul E. McKenney
parent e99033c5c1
commit 72fe701b70
3 changed files with 26 additions and 18 deletions
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8
kernel/rcutree.c
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@ -1199,8 +1199,8 @@ static void rcu_do_batch(struct rcu_state *rsp, struct rcu_data *rdp)
/* If no callbacks are ready, just return.*/
if (!cpu_has_callbacks_ready_to_invoke(rdp)) {
trace_rcu_batch_start(0, 0);
trace_rcu_batch_end(0);
trace_rcu_batch_start(rsp->name, 0, 0);
trace_rcu_batch_end(rsp->name, 0);
return;
}
@ -1210,7 +1210,7 @@ static void rcu_do_batch(struct rcu_state *rsp, struct rcu_data *rdp)
*/
local_irq_save(flags);
bl = rdp->blimit;
trace_rcu_batch_start(rdp->qlen, bl);
trace_rcu_batch_start(rsp->name, rdp->qlen, bl);
list = rdp->nxtlist;
rdp->nxtlist = *rdp->nxttail[RCU_DONE_TAIL];
*rdp->nxttail[RCU_DONE_TAIL] = NULL;
@ -1233,7 +1233,7 @@ static void rcu_do_batch(struct rcu_state *rsp, struct rcu_data *rdp)
}
local_irq_save(flags);
trace_rcu_batch_end(count);
trace_rcu_batch_end(rsp->name, count);
/* Update count, and requeue any remaining callbacks. */
rdp->qlen -= count;