openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

rcu: Add TPS() to event-traced strings 

Strings used in event tracing need to be specially handled, for example,
using the TPS() macro.  Without the TPS() macro, although output looks
fine from within a running kernel, extracting traces from a crash dump
produces garbage instead of strings.  This commit therefore adds the TPS()
macro to some unadorned strings that were passed to event-tracing macros.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Paul E. McKenney 2017-06-06 15:49:39 -07:00
parent ccdd29ffff
commit bedbb648ef
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
kernel/rcu/tree_plugin.h
View File

@ -2073,7 +2073,7 @@ static void nocb_leader_wait(struct rcu_data *my_rdp)
/* Wait for callbacks to appear. */
if (!rcu_nocb_poll) {
trace_rcu_nocb_wake(my_rdp->rsp->name, my_rdp->cpu, "Sleep");
trace_rcu_nocb_wake(my_rdp->rsp->name, my_rdp->cpu, TPS("Sleep"));
swait_event_interruptible(my_rdp->nocb_wq,
!READ_ONCE(my_rdp->nocb_leader_sleep));
raw_spin_lock_irqsave(&my_rdp->nocb_lock, flags);
@ -2083,7 +2083,7 @@ static void nocb_leader_wait(struct rcu_data *my_rdp)
raw_spin_unlock_irqrestore(&my_rdp->nocb_lock, flags);
} else if (firsttime) {
firsttime = false; /* Don't drown trace log with "Poll"! */
trace_rcu_nocb_wake(my_rdp->rsp->name, my_rdp->cpu, "Poll");
trace_rcu_nocb_wake(my_rdp->rsp->name, my_rdp->cpu, TPS("Poll"));
}
/*
@ -2111,7 +2111,7 @@ static void nocb_leader_wait(struct rcu_data *my_rdp)
schedule_timeout_interruptible(1);
} else {
trace_rcu_nocb_wake(my_rdp->rsp->name, my_rdp->cpu,
"WokeEmpty");
TPS("WokeEmpty"));
}
goto wait_again;
}
@ -2155,7 +2155,7 @@ static void nocb_leader_wait(struct rcu_data *my_rdp)
static void nocb_follower_wait(struct rcu_data *rdp)
{
for (;;) {
trace_rcu_nocb_wake(rdp->rsp->name, rdp->cpu, "FollowerSleep");
trace_rcu_nocb_wake(rdp->rsp->name, rdp->cpu, TPS("FollowerSleep"));
swait_event_interruptible(rdp->nocb_wq,
READ_ONCE(rdp->nocb_follower_head));
if (smp_load_acquire(&rdp->nocb_follower_head)) {
@ -2163,7 +2163,7 @@ static void nocb_follower_wait(struct rcu_data *rdp)
return;
}
WARN_ON(signal_pending(current));
trace_rcu_nocb_wake(rdp->rsp->name, rdp->cpu, "WokeEmpty");
trace_rcu_nocb_wake(rdp->rsp->name, rdp->cpu, TPS("WokeEmpty"));
}
}
@ -2198,7 +2198,7 @@ static int rcu_nocb_kthread(void *arg)
rdp->nocb_follower_tail = &rdp->nocb_follower_head;
raw_spin_unlock_irqrestore(&rdp->nocb_lock, flags);
BUG_ON(!list);
trace_rcu_nocb_wake(rdp->rsp->name, rdp->cpu, "WokeNonEmpty");
trace_rcu_nocb_wake(rdp->rsp->name, rdp->cpu, TPS("WokeNonEmpty"));
/* Each pass through the following loop invokes a callback. */
trace_rcu_batch_start(rdp->rsp->name,