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rcu: Convert rcu_preempt_task tracepoint to ->gp_seq

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This commit makes the rcu_preempt_task tracepoint use ->gp_seq instead
of ->gpnum.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2018-05-01 13:35:20 -07:00
parent 63d86a7e85
commit 598ce09480
2 changed files with 8 additions and 8 deletions
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12
include/trace/events/rcu.h
View File

@ -298,24 +298,24 @@ TRACE_EVENT(rcu_nocb_wake,
*/
TRACE_EVENT(rcu_preempt_task,
TP_PROTO(const char *rcuname, int pid, unsigned long gpnum),
TP_PROTO(const char *rcuname, int pid, unsigned long gp_seq),
TP_ARGS(rcuname, pid, gpnum),
TP_ARGS(rcuname, pid, gp_seq),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(unsigned long, gpnum)
__field(unsigned long, gp_seq)
__field(int, pid)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->gpnum = gpnum;
__entry->gp_seq = gp_seq;
__entry->pid = pid;
),
TP_printk("%s %lu %d",
__entry->rcuname, __entry->gpnum, __entry->pid)
__entry->rcuname, __entry->gp_seq, __entry->pid)
);
/*
@ -761,7 +761,7 @@ TRACE_EVENT(rcu_barrier,
#define trace_rcu_exp_funnel_lock(rcuname, level, grplo, grphi, gpevent) \
do { } while (0)
#define trace_rcu_nocb_wake(rcuname, cpu, reason) do { } while (0)
#define trace_rcu_preempt_task(rcuname, pid, gpnum) do { } while (0)
#define trace_rcu_preempt_task(rcuname, pid, gp_seq) do { } while (0)
#define trace_rcu_unlock_preempted_task(rcuname, gpnum, pid) do { } while (0)
#define trace_rcu_quiescent_state_report(rcuname, gpnum, mask, qsmask, level, \
grplo, grphi, gp_tasks) do { } \

4
kernel/rcu/tree_plugin.h
View File

@ -350,8 +350,8 @@ static void rcu_preempt_note_context_switch(bool preempt)
trace_rcu_preempt_task(rdp->rsp->name,
t->pid,
(rnp->qsmask & rdp->grpmask)
? rnp->gpnum
: rnp->gpnum + 1);
? rnp->gp_seq
: rcu_seq_snap(&rnp->gp_seq));
rcu_preempt_ctxt_queue(rnp, rdp);
} else if (t->rcu_read_lock_nesting < 0 &&
t->rcu_read_unlock_special.s) {