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Message-ID: <20100227132955.GA26908@elte.hu>
Date: Sat, 27 Feb 2010 14:29:55 +0100
From: Ingo Molnar <mingo@...e.hu>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Jens Axboe <jens.axboe@...cle.com>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Andrew Morton <akpm@...ux-foundation.org>,
Thomas Gleixner <tglx@...utronix.de>
Subject: [GIT PULL] core/ipi changes for v2.6.34
Linus,
Please pull the latest core-ipi-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git core-ipi-for-linus
One small optimization.
Thanks,
Ingo
------------------>
Milton Miller (1):
generic-ipi: Optimize accesses by using DEFINE_PER_CPU_SHARED_ALIGNED for IPI data
kernel/smp.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/kernel/smp.c b/kernel/smp.c
index f104084..9867b6b 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -12,8 +12,6 @@
#include <linux/smp.h>
#include <linux/cpu.h>
-static DEFINE_PER_CPU(struct call_single_queue, call_single_queue);
-
static struct {
struct list_head queue;
raw_spinlock_t lock;
@@ -33,12 +31,14 @@ struct call_function_data {
cpumask_var_t cpumask;
};
+static DEFINE_PER_CPU_SHARED_ALIGNED(struct call_function_data, cfd_data);
+
struct call_single_queue {
struct list_head list;
raw_spinlock_t lock;
};
-static DEFINE_PER_CPU(struct call_function_data, cfd_data);
+static DEFINE_PER_CPU_SHARED_ALIGNED(struct call_single_queue, call_single_queue);
static int
hotplug_cfd(struct notifier_block *nfb, unsigned long action, void *hcpu)
@@ -256,7 +256,7 @@ void generic_smp_call_function_single_interrupt(void)
}
}
-static DEFINE_PER_CPU(struct call_single_data, csd_data);
+static DEFINE_PER_CPU_SHARED_ALIGNED(struct call_single_data, csd_data);
/*
* smp_call_function_single - Run a function on a specific CPU
--
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