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SubjectRe: intermittant petabyte usage reported with broadcom nic
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On Mon, 2007-04-02 at 17:41 +1000, CaT wrote:
> On Mon, Apr 02, 2007 at 12:13:00AM -0700, Andrew Morton wrote:
> > On Mon, 2 Apr 2007 11:43:19 +1000 CaT <cat@zip.com.au> wrote:
> >
> > > I take minute by minute snapshots of network traffic by sampling
> > > /proc/net/dev and most of the time everything works fine. Occasionally
> > > though I get petabyte byte traffic and corresponding packet traffic.
> >
> > How frequently?
>
> I can count about 6 over the past month.
>
I did a quick test on a 64-bit kernel and did not see any problem with
the counters. I'll ask the lab to set up a longer term test and monitor
the counters for bogus values.

I also like Andi's idea of using change_page_attr() to isolate the
problem. I'll try to send you a debug patch in the next few days to try
that out. Thanks.

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