From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca,
josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de,
peterz@infradead.org, rostedt@goodmis.org,
Valdis.Kletnieks@vt.edu, dhowells@redhat.com,
edumazet@google.com, darren@dvhart.com, fweisbec@gmail.com,
sbw@mit.edu, patches@linaro.org,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 08/14] rcu: Fix tracing formatting
Date: Tue, 30 Oct 2012 10:05:07 -0700 [thread overview]
Message-ID: <1351616713-26930-8-git-send-email-paulmck@linux.vnet.ibm.com> (raw)
In-Reply-To: <1351616713-26930-1-git-send-email-paulmck@linux.vnet.ibm.com>
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
The rcu_state structure's ->completed field is unsigned long, so this
commit adjusts show_one_rcugp()'s printf() format to suit. Also add
the required ACCESS_ONCE() directives while we are in this function.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
kernel/rcutree.c | 4 ++--
kernel/rcutree_trace.c | 8 ++++----
2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index b966d56..8ed9c48 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -68,8 +68,8 @@ static struct lock_class_key rcu_fqs_class[RCU_NUM_LVLS];
.level = { &sname##_state.node[0] }, \
.call = cr, \
.fqs_state = RCU_GP_IDLE, \
- .gpnum = -300, \
- .completed = -300, \
+ .gpnum = 0UL - 300UL, \
+ .completed = 0UL - 300UL, \
.orphan_lock = __RAW_SPIN_LOCK_UNLOCKED(&sname##_state.orphan_lock), \
.orphan_nxttail = &sname##_state.orphan_nxtlist, \
.orphan_donetail = &sname##_state.orphan_donelist, \
diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c
index bcc4865..209e696 100644
--- a/kernel/rcutree_trace.c
+++ b/kernel/rcutree_trace.c
@@ -301,15 +301,15 @@ static void show_one_rcugp(struct seq_file *m, struct rcu_state *rsp)
struct rcu_node *rnp = &rsp->node[0];
raw_spin_lock_irqsave(&rnp->lock, flags);
- completed = rsp->completed;
- gpnum = rsp->gpnum;
- if (rsp->completed == rsp->gpnum)
+ completed = ACCESS_ONCE(rsp->completed);
+ gpnum = ACCESS_ONCE(rsp->gpnum);
+ if (completed == gpnum)
gpage = 0;
else
gpage = jiffies - rsp->gp_start;
gpmax = rsp->gp_max;
raw_spin_unlock_irqrestore(&rnp->lock, flags);
- seq_printf(m, "%s: completed=%ld gpnum=%lu age=%ld max=%ld\n",
+ seq_printf(m, "%s: completed=%lu gpnum=%lu age=%ld max=%ld\n",
rsp->name, completed, gpnum, gpage, gpmax);
}
--
1.7.8
next prev parent reply other threads:[~2012-10-30 17:34 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-30 17:04 [PATCH tip/core/rcu 0/14] Tracing changes for 3.8 Paul E. McKenney
2012-10-30 17:05 ` [PATCH tip/core/rcu 01/14] rcu: Create directory for each flavor of rcu Paul E. McKenney
2012-10-30 17:05 ` [PATCH tip/core/rcu 02/14] rcu: Fundamental facility for 'CPU units sequence reading' Paul E. McKenney
2012-10-30 17:05 ` [PATCH tip/core/rcu 03/14] rcu: Optimize the 'rcudata' for RCU trace Paul E. McKenney
2012-10-30 17:05 ` [PATCH tip/core/rcu 04/14] rcu: Optimize the 'rcudata.csv' " Paul E. McKenney
2012-10-30 17:05 ` [PATCH tip/core/rcu 05/14] rcu: Optimize the 'rcu_pending' " Paul E. McKenney
2012-10-30 17:05 ` [PATCH tip/core/rcu 06/14] rcu: Replace the old interface with the new one Paul E. McKenney
2012-10-30 17:05 ` [PATCH tip/core/rcu 07/14] rcu: Remove the interface "rcudata.csv" Paul E. McKenney
2012-10-30 17:05 ` Paul E. McKenney [this message]
2012-10-30 17:05 ` [PATCH tip/core/rcu 09/14] rcu: split 'rcubarrier' to each flavor Paul E. McKenney
2012-10-30 17:05 ` [PATCH tip/core/rcu 10/14] rcu: split 'rcuboost' " Paul E. McKenney
2012-10-30 17:05 ` [PATCH tip/core/rcu 11/14] rcu: split 'rcugp' " Paul E. McKenney
2012-10-30 17:05 ` [PATCH tip/core/rcu 12/14] rcu: split 'rcuhier' " Paul E. McKenney
2012-10-30 17:05 ` [PATCH tip/core/rcu 13/14] rcu: Remove old debugfs interfaces and also RCU flavor name Paul E. McKenney
2012-10-30 17:05 ` [PATCH tip/core/rcu 14/14] rcu: Add tracing for synchronize_sched_expedited() Paul E. McKenney
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