From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Christoph Lameter <cl@linux.com>
Subject: [RFC][PATCH 2/5] mm: Switch mod_state() to __this_cpu_read()
Date: Mon, 19 Sep 2011 17:20:42 -0400 [thread overview]
Message-ID: <20110919212640.688732950@goodmis.org> (raw)
In-Reply-To: 20110919212040.745370781@goodmis.org
[-- Attachment #1: 0002-mm-Switch-mod_state-to-__this_cpu_read.patch --]
[-- Type: text/plain, Size: 868 bytes --]
From: Steven Rostedt <srostedt@redhat.com>
The code in mod_state() is already made to handle the raciness of
this_cpu_read(). Have the code use __this_cpu_read() instead so
the debug code does not trigger warnings about it.
Cc: Christoph Lameter <cl@linux.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
mm/vmstat.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/vmstat.c b/mm/vmstat.c
index d52b13d..41a843f 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -328,9 +328,9 @@ static inline void mod_state(struct zone *zone,
* Most of the time the thresholds are the same anyways
* for all cpus in a zone.
*/
- t = this_cpu_read(pcp->stat_threshold);
+ t = __this_cpu_read(pcp->stat_threshold);
- o = this_cpu_read(*p);
+ o = __this_cpu_read(*p);
n = delta + o;
if (n > t || n < -t) {
--
1.7.5.4
next prev parent reply other threads:[~2011-09-19 21:27 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-19 21:20 [RFC][PATCH 0/5] Introduce checks for preemptable code for this_cpu_read/write() Steven Rostedt
2011-09-19 21:20 ` [RFC][PATCH 1/5] x86: Remove const_udelay() caring about which cpu var it uses Steven Rostedt
2011-09-19 21:51 ` Christoph Lameter
2011-09-19 23:31 ` Steven Rostedt
2011-09-19 21:20 ` Steven Rostedt [this message]
2011-09-19 22:02 ` [RFC][PATCH 2/5] mm: Switch mod_state() to __this_cpu_read() Christoph Lameter
2011-09-19 23:48 ` Steven Rostedt
2011-09-20 14:46 ` Christoph Lameter
2011-09-20 15:16 ` Steven Rostedt
2011-09-20 15:54 ` Christoph Lameter
2011-09-20 16:07 ` Steven Rostedt
2011-09-20 22:19 ` Valdis.Kletnieks
2011-09-20 13:49 ` Thomas Gleixner
2011-09-20 14:01 ` Steven Rostedt
2011-09-20 14:51 ` Christoph Lameter
2011-09-20 15:11 ` Steven Rostedt
2011-09-20 15:59 ` Christoph Lameter
2011-09-20 16:03 ` Steven Rostedt
2011-09-20 16:07 ` Christoph Lameter
2011-09-20 15:27 ` Thomas Gleixner
2011-09-20 16:02 ` Christoph Lameter
2011-09-20 16:51 ` Thomas Gleixner
2011-09-20 17:08 ` Steven Rostedt
2011-09-19 21:20 ` [RFC][PATCH 3/5] memcg: Disable preemption in memcg_check_events() Steven Rostedt
2011-09-20 14:20 ` Johannes Weiner
2011-09-20 14:24 ` Johannes Weiner
2011-09-20 14:33 ` Steven Rostedt
2011-09-24 0:46 ` Steven Rostedt
2011-09-19 21:20 ` [RFC][PATCH 4/5] printk: Have wake_up_klogd() use __this_cpu_write() Steven Rostedt
2011-09-19 21:54 ` Christoph Lameter
2011-09-19 23:33 ` Steven Rostedt
2011-09-20 14:54 ` Christoph Lameter
2011-09-20 14:55 ` Peter Zijlstra
2011-09-19 21:20 ` [RFC][PATCH 5/5] percpu: Add preempt checks back into this_cpu_read/write() Steven Rostedt
2011-09-19 21:49 ` [RFC][PATCH 0/5] Introduce checks for preemptable code for this_cpu_read/write() Christoph Lameter
2011-09-20 3:06 ` Steven Rostedt
2011-09-20 12:44 ` Valdis.Kletnieks
2011-09-20 13:51 ` Thomas Gleixner
2011-09-20 14:58 ` Christoph Lameter
2011-09-20 15:17 ` Steven Rostedt
2011-09-20 14:57 ` Christoph Lameter
2011-09-20 15:19 ` Steven Rostedt
2011-09-20 16:08 ` Christoph Lameter
2011-09-20 16:31 ` Steven Rostedt
2011-09-20 16:56 ` Steven Rostedt
2011-09-20 17:09 ` Peter Zijlstra
2011-09-20 17:15 ` Steven Rostedt
2011-09-20 17:25 ` Mathieu Desnoyers
2011-09-20 18:03 ` Steven Rostedt
2011-09-20 18:12 ` Mathieu Desnoyers
2011-09-20 18:27 ` Steven Rostedt
2011-09-20 18:34 ` Mathieu Desnoyers
2011-09-20 22:32 ` Valdis.Kletnieks
2011-09-20 22:17 ` Valdis.Kletnieks
2011-09-21 1:33 ` Steven Rostedt
2011-09-20 15:46 ` Mathieu Desnoyers
2011-09-20 16:00 ` Steven Rostedt
2011-09-20 16:10 ` Christoph Lameter
2011-09-20 16:50 ` Peter Zijlstra
2011-09-20 18:54 ` Steven Rostedt
2011-09-21 15:16 ` Christoph Lameter
2011-09-21 15:31 ` Steven Rostedt
2011-09-21 15:59 ` Christoph Lameter
2011-09-21 16:12 ` Steven Rostedt
2011-09-21 16:32 ` Thomas Gleixner
2011-09-20 2:20 ` Andi Kleen
2011-09-20 3:12 ` Steven Rostedt
2011-09-20 3:17 ` Steven Rostedt
2011-09-20 8:32 ` Thomas Gleixner
2011-09-20 12:10 ` Steven Rostedt
2011-09-20 15:03 ` Christoph Lameter
2011-09-20 15:07 ` Peter Zijlstra
2011-09-20 16:05 ` Christoph Lameter
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