Re: Negative values in /proc/latency_stats

[Arjan van de Ven]

On Mon, 2 Feb 2009 20:55:45 -0800
Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:

> On Sat, 31 Jan 2009 14:42:20 +0100 Corrado Zoccolo
> <czoccolo@xxxxxxxxx> wrote:
> 
> > Hello,
> > I found negative numbers sometimes appear in /proc/latency_stats
> > (vanilla kernel 2.6.29-rc3, on x86 cpu, configuration attached)
> > 
> > [corrado@localhost ~]$ while sleep 1; do grep --
> > - /proc/latency_stats
> > >> neg_stats; done
> > ^Z
> > [1]+  Stopped                 sleep 1
> > [corrado@localhost ~]$ cat neg_stats
> > 1 -486373534 -486373534 sys_rt_sigsuspend sysenter_do_call
> > 1 -486373534 -486373534 sys_rt_sigsuspend sysenter_do_call
> > 1 -486373534 -486373534 sys_rt_sigsuspend sysenter_do_call
> > 
> > 
> > I suspect this can be the cause for
> > https://bugs.launchpad.net/ubuntu/+source/latencytop/+bug/297776 ,
> > as I saw it happening on my machine during a kernel recompilation.
> > 
> 
> <discovers kernel/latencytop.c>

how about this?