linux-kernel - Re: [BUG] vmstat reports no interrupts

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Date:	Sat, 21 Jan 2012 09:09:39 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	Glauber Costa <glommer@...allels.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org
Subject: Re: [BUG] vmstat reports no interrupts


* Eric Dumazet <eric.dumazet@...il.com> wrote:

> Le samedi 14 janvier 2012 à 00:01 +0000, Russell King - ARM Linux a
> écrit :
> > From: Russell King <rmk+kernel@....linux.org.uk>
> > proc: fix /proc/stat intr sum
> > 
> > Commit 3292beb340c7688 (sched/accounting: Change cpustat fields to an array)
> > deleted the code which provides us with the sum of all interrupts in
> > the system, causing vmstat to report zero interrupts occuring in the
> > system.  Fix this by restoring the code.
> > 
> > Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
> > Tested-by: Russell King <rmk+kernel@....linux.org.uk> [on ARM]
> > ---
> >  fs/proc/stat.c |    2 ++
> >  1 files changed, 2 insertions(+), 0 deletions(-)
> > 
> > diff --git a/fs/proc/stat.c b/fs/proc/stat.c
> > index d76ca6a..121f77c 100644
> > --- a/fs/proc/stat.c
> > +++ b/fs/proc/stat.c
> > @@ -77,6 +77,8 @@ static int show_stat(struct seq_file *p, void *v)
> >  		steal += kcpustat_cpu(i).cpustat[CPUTIME_STEAL];
> >  		guest += kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
> >  		guest_nice += kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
> > +		sum += kstat_cpu_irqs_sum(i);
> > +		sum += arch_irq_stat_cpu(i);
> >  
> >  		for (j = 0; j < NR_SOFTIRQS; j++) {
> >  			unsigned int softirq_stat = kstat_softirqs_cpu(j, i);
> > 
> 
> Any news on this patch being accepted and pushed to Linus ?

It should be in v3.3-rc1.

Thanks,

	Ingo
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