From: Frederic Weisbecker <fweisbec@gmail.com>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Steven Rostedt <rostedt@goodmis.org>
Subject: [RFC PATCH 3/5] x86: Implement arch_irq_work_use_tick
Date: Fri, 12 Oct 2012 20:09:34 +0200 [thread overview]
Message-ID: <1350065376-23353-4-git-send-email-fweisbec@gmail.com> (raw)
In-Reply-To: <1350065376-23353-1-git-send-email-fweisbec@gmail.com>
Most of the time, x86 can trigger self-IPIs. Tell
irq work subsystem about it.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
---
arch/x86/include/asm/irq_work.h | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/irq_work.h b/arch/x86/include/asm/irq_work.h
index dad8266..fc62b60 100644
--- a/arch/x86/include/asm/irq_work.h
+++ b/arch/x86/include/asm/irq_work.h
@@ -2,8 +2,12 @@
#define _ASM_X86_IRQ_WORK_H
#ifdef CONFIG_X86_LOCAL_APIC
+#include <asm/cpufeature.h>
+
extern void __arch_irq_work_raise(void);
#define arch_irq_work_raise __arch_irq_work_raise
+
+#define arch_irq_work_use_tick() (!cpu_has_apic)
#endif
#include <asm-generic/irq_work.h>
--
1.7.5.4
next prev parent reply other threads:[~2012-10-12 18:09 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-12 18:09 [RFC PATCH 0/5] printk: Make it usable on nohz CPUs Frederic Weisbecker
2012-10-12 18:09 ` [RFC PATCH 1/5] irq_work: Move irq_work_raise() declaration/default definition to arch headers Frederic Weisbecker
2012-10-15 16:11 ` Catalin Marinas
2012-10-15 20:02 ` Steven Rostedt
2012-10-15 20:23 ` Frederic Weisbecker
2012-10-15 20:39 ` Steven Rostedt
2012-10-15 21:34 ` Arnd Bergmann
2012-10-15 22:18 ` Frederic Weisbecker
2012-10-16 3:12 ` Mark Brown
2012-10-16 9:25 ` Arnd Bergmann
2012-10-16 15:40 ` Mark Brown
2012-10-12 18:09 ` [RFC PATCH 2/5] irq_work: Only run irq_work from tick if arch needs it Frederic Weisbecker
2012-10-12 18:09 ` Frederic Weisbecker [this message]
2012-10-12 18:09 ` [RFC PATCH 4/5] nohz: Add API to check tick state Frederic Weisbecker
2012-10-12 18:09 ` [RFC PATCH 5/5] printk: Wake up klogd with irq_work on nohz CPU Frederic Weisbecker
2012-10-19 15:50 ` [RFC PATCH 0/5] printk: Make it usable on nohz CPUs Frederic Weisbecker
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