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From: Pingfan Liu <kernelfans@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: Pingfan Liu <kernelfans@gmail.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Jisheng Zhang <Jisheng.Zhang@synaptics.com>,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	Vlastimil Babka <vbabka@suse.cz>,
	Andrew Morton <akpm@linux-foundation.org>,
	"Guilherme G. Piccoli" <gpiccoli@canonical.com>,
	Petr Mladek <pmladek@suse.com>,
	kexec@lists.infradead.org
Subject: [PATCH 1/3] x86/irq: account the unused irq
Date: Wed, 18 Nov 2020 11:36:16 +0800	[thread overview]
Message-ID: <1605670578-23681-2-git-send-email-kernelfans@gmail.com> (raw)
In-Reply-To: <1605670578-23681-1-git-send-email-kernelfans@gmail.com>

Accounting the unused irq in order to count it if irq flood.

Signed-off-by: Pingfan Liu <kernelfans@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Guilherme G. Piccoli" <gpiccoli@canonical.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: kexec@lists.infradead.org
To: linux-kernel@vger.kernel.org
---
 arch/x86/kernel/irq.c       | 1 +
 include/linux/kernel_stat.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index c5dd503..6f583a7 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -254,6 +254,7 @@ DEFINE_IDTENTRY_IRQ(common_interrupt)
 			pr_emerg_ratelimited("%s: %d.%u No irq handler for vector\n",
 					     __func__, smp_processor_id(),
 					     vector);
+			__this_cpu_inc(kstat.unused_irqs_sum);
 		} else {
 			__this_cpu_write(vector_irq[vector], VECTOR_UNUSED);
 		}
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index 89f0745..c8d5cb8 100644
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -37,6 +37,7 @@ struct kernel_cpustat {
 
 struct kernel_stat {
 	unsigned long irqs_sum;
+	unsigned long unused_irqs_sum;
 	unsigned int softirqs[NR_SOFTIRQS];
 };
 
-- 
2.7.5


WARNING: multiple messages have this Message-ID (diff)
From: Pingfan Liu <kernelfans@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: Petr Mladek <pmladek@suse.com>,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	"Guilherme G. Piccoli" <gpiccoli@canonical.com>,
	kexec@lists.infradead.org, Pingfan Liu <kernelfans@gmail.com>,
	Jisheng Zhang <Jisheng.Zhang@synaptics.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	Vlastimil Babka <vbabka@suse.cz>
Subject: [PATCH 1/3] x86/irq: account the unused irq
Date: Wed, 18 Nov 2020 11:36:16 +0800	[thread overview]
Message-ID: <1605670578-23681-2-git-send-email-kernelfans@gmail.com> (raw)
In-Reply-To: <1605670578-23681-1-git-send-email-kernelfans@gmail.com>

Accounting the unused irq in order to count it if irq flood.

Signed-off-by: Pingfan Liu <kernelfans@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Guilherme G. Piccoli" <gpiccoli@canonical.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: kexec@lists.infradead.org
To: linux-kernel@vger.kernel.org
---
 arch/x86/kernel/irq.c       | 1 +
 include/linux/kernel_stat.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index c5dd503..6f583a7 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -254,6 +254,7 @@ DEFINE_IDTENTRY_IRQ(common_interrupt)
 			pr_emerg_ratelimited("%s: %d.%u No irq handler for vector\n",
 					     __func__, smp_processor_id(),
 					     vector);
+			__this_cpu_inc(kstat.unused_irqs_sum);
 		} else {
 			__this_cpu_write(vector_irq[vector], VECTOR_UNUSED);
 		}
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index 89f0745..c8d5cb8 100644
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -37,6 +37,7 @@ struct kernel_cpustat {
 
 struct kernel_stat {
 	unsigned long irqs_sum;
+	unsigned long unused_irqs_sum;
 	unsigned int softirqs[NR_SOFTIRQS];
 };
 
-- 
2.7.5


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  reply	other threads:[~2020-11-18  3:37 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-22  5:56 [PATCH 0/3] warn and suppress irqflood Pingfan Liu
2020-10-22  5:56 ` Pingfan Liu
2020-10-22  5:56 ` [PATCH 1/3] kernel/watchdog: show irq percentage if irq floods Pingfan Liu
2020-10-22  5:56   ` Pingfan Liu
2020-10-22  5:56 ` [PATCH 2/3] kernel/watchdog: suppress max irq when " Pingfan Liu
2020-10-22  5:56   ` Pingfan Liu
2020-10-22  5:56 ` [PATCH 3/3] Documentation: introduce a param "irqflood_suppress" Pingfan Liu
2020-10-22  5:56   ` Pingfan Liu
2020-10-22  8:37 ` [PATCH 0/3] warn and suppress irqflood Thomas Gleixner
2020-10-22  8:37   ` Thomas Gleixner
2020-10-25 11:12   ` Pingfan Liu
2020-10-25 11:12     ` Pingfan Liu
2020-10-25 11:12     ` Pingfan Liu
2020-10-25 12:21     ` [Skiboot] " Oliver O'Halloran
2020-10-25 12:21       ` Oliver O'Halloran
2020-10-25 13:11       ` Pingfan Liu
2020-10-25 13:11         ` Pingfan Liu
2020-10-25 13:51         ` Oliver O'Halloran
2020-10-25 13:51           ` Oliver O'Halloran
2020-10-26 15:06     ` Guilherme Piccoli
2020-10-26 15:06       ` Guilherme Piccoli
2020-10-26 19:59       ` Thomas Gleixner
2020-10-26 19:59         ` Thomas Gleixner
2020-10-26 20:28         ` Guilherme Piccoli
2020-10-26 20:28           ` Guilherme Piccoli
2020-10-26 21:21           ` Thomas Gleixner
2020-10-26 21:21             ` Thomas Gleixner
2020-10-27 12:28             ` Guilherme Piccoli
2020-10-27 12:28               ` Guilherme Piccoli
2020-10-28  6:02         ` Pingfan Liu
2020-10-28  6:02           ` Pingfan Liu
2020-10-28 11:58           ` Thomas Gleixner
2020-10-28 11:58             ` Thomas Gleixner
2020-10-29  6:26             ` Pingfan Liu
2020-10-29  6:26               ` Pingfan Liu
2020-11-06  5:53             ` Pingfan Liu
2020-11-06  5:53               ` Pingfan Liu
2020-11-18  3:36             ` [PATCH 0/3] use soft lockup to detect irq flood Pingfan Liu
2020-11-18  3:36               ` Pingfan Liu
2020-11-18  3:36               ` Pingfan Liu [this message]
2020-11-18  3:36                 ` [PATCH 1/3] x86/irq: account the unused irq Pingfan Liu
2020-11-18  3:36               ` [PATCH 2/3] kernel/watchdog: make watchdog_touch_ts more accurate by using nanosecond Pingfan Liu
2020-11-18  3:36                 ` Pingfan Liu
2020-11-18  3:36               ` [PATCH 3/3] kernel/watchdog: use soft lockup to detect irq flood Pingfan Liu
2020-11-18  3:36                 ` Pingfan Liu
2021-03-02  7:45             ` [PATCH 0/3] warn and suppress irqflood Sai Prakash Ranjan
2021-03-02  7:45               ` Sai Prakash Ranjan
2021-06-05  2:32               ` Sai Prakash Ranjan
2021-06-05  2:32                 ` Sai Prakash Ranjan

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