rcu: Add RCU type to callback-invocation tracing
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>
diff --git a/kernel/rcutiny.c b/kernel/rcutiny.c
index 0d28974..1c37bdd 100644
--- a/kernel/rcutiny.c
+++ b/kernel/rcutiny.c
@@ -168,14 +168,14 @@
/* If no RCU callbacks ready to invoke, just return. */
if (&rcp->rcucblist == rcp->donetail) {
- RCU_TRACE(trace_rcu_batch_start(0, -1));
- RCU_TRACE(trace_rcu_batch_end(0));
+ RCU_TRACE(trace_rcu_batch_start(rcp->name, 0, -1));
+ RCU_TRACE(trace_rcu_batch_end(rcp->name, 0));
return;
}
/* Move the ready-to-invoke callbacks to a local list. */
local_irq_save(flags);
- RCU_TRACE(trace_rcu_batch_start(0, -1));
+ RCU_TRACE(trace_rcu_batch_start(rcp->name, 0, -1));
list = rcp->rcucblist;
rcp->rcucblist = *rcp->donetail;
*rcp->donetail = NULL;
@@ -197,7 +197,7 @@
RCU_TRACE(cb_count++);
}
RCU_TRACE(rcu_trace_sub_qlen(rcp, cb_count));
- RCU_TRACE(trace_rcu_batch_end(cb_count));
+ RCU_TRACE(trace_rcu_batch_end(rcp->name, cb_count));
}
/*
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index b953e2c..eb6e731 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1199,8 +1199,8 @@
/* 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 @@
*/
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 @@
}
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;
