This is a note to let you know that I've just added the patch titled
x86: Eliminate irq_mis_count counted in arch_irq_stat
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-eliminate-irq_mis_count-counted-in-arch_irq_stat.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f7b0e1055574ce06ab53391263b4e205bf38daf3 Mon Sep 17 00:00:00 2001
From: Li Fei <fei.li@xxxxxxxxx>
Date: Fri, 26 Apr 2013 20:50:11 +0800
Subject: x86: Eliminate irq_mis_count counted in arch_irq_stat
From: Li Fei <fei.li@xxxxxxxxx>
commit f7b0e1055574ce06ab53391263b4e205bf38daf3 upstream.
With the current implementation, kstat_cpu(cpu).irqs_sum is also
increased in case of irq_mis_count increment.
So there is no need to count irq_mis_count in arch_irq_stat,
otherwise irq_mis_count will be counted twice in the sum of
/proc/stat.
Reported-by: Liu Chuansheng <chuansheng.liu@xxxxxxxxx>
Signed-off-by: Li Fei <fei.li@xxxxxxxxx>
Acked-by: Liu Chuansheng <chuansheng.liu@xxxxxxxxx>
Cc: tomoki.sekiyama.qu@xxxxxxxxxxx
Cc: joe@xxxxxxxxxxx
Link: http://lkml.kernel.org/r/1366980611.32469.7.camel@fli24-HP-Compaq-8100-Elite-CMT-PC
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/irq.c | 4 ----
1 file changed, 4 deletions(-)
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -165,10 +165,6 @@ u64 arch_irq_stat_cpu(unsigned int cpu)
u64 arch_irq_stat(void)
{
u64 sum = atomic_read(&irq_err_count);
-
-#ifdef CONFIG_X86_IO_APIC
- sum += atomic_read(&irq_mis_count);
-#endif
return sum;
}
Patches currently in stable-queue which might be from fei.li@xxxxxxxxx are
queue-3.4/x86-eliminate-irq_mis_count-counted-in-arch_irq_stat.patch
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