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| author | Li Fei <fei.li@intel.com> | 2013-04-26 20:50:11 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-07 20:33:15 -0700 |
| commit | 00cd3d291eb32b75b43fa945a5bce1357e03d58d (patch) | |
| tree | b0d12e4c0ae1954dc7ca4107b3dc0af6091ae15c | |
| parent | 32f7af708e7e73cc0e2a280a06fbb13a0b113692 (diff) | |
| download | lwn-00cd3d291eb32b75b43fa945a5bce1357e03d58d.tar.gz lwn-00cd3d291eb32b75b43fa945a5bce1357e03d58d.zip | |
x86: Eliminate irq_mis_count counted in arch_irq_stat
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@intel.com>
Signed-off-by: Li Fei <fei.li@intel.com>
Acked-by: Liu Chuansheng <chuansheng.liu@intel.com>
Cc: tomoki.sekiyama.qu@hitachi.com
Cc: joe@perches.com
Link: http://lkml.kernel.org/r/1366980611.32469.7.camel@fli24-HP-Compaq-8100-Elite-CMT-PC
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/x86/kernel/irq.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c index e4595f105910..84b778962c66 100644 --- 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; } |