Re: linux-next: boot problem with next-20120607

Stephen Rothwell
2012-06-07T23:58:09Z

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Hi Andrew,

On Thu, 7 Jun 2012 15:05:49 -0700 Andrew Morton <akpm@linux-foundation.org> wrote:
>
> On Thu, 7 Jun 2012 13:53:20 +1000 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> >
> > My boot of next-20120607 in PowerPC produces lots of these warnings:
> >
> > BUG: Bad rss-counter state mm:c000000278508000 idx:0 val:-27
> > BUG: Bad rss-counter state mm:c000000278284000 idx:0 val:-27
> > BUG: Bad rss-counter state mm:c000000279e13000 idx:0 val:-27
> > BUG: Bad rss-counter state mm:c000000278285400 idx:0 val:-27
> >
> > And so on (with different mm, idx and val numbers). Searching showed me
> > commit "mm: correctly synchronize rss-counters at exit/exec" which seems
> > to be there to fix this exact problem?
>
> Well that's a worry. Are you really sure
> mm-correctly-synchronize-rss-counters-at-exit-exec.patch was applied at
> the time?

Yes. This was exactly next-20120607.

> There's been an extended amount of inconclusive waffling on that patch,
> but I thought it concerned the best way to fix it, rather than
> *whether* it fixes it.

Ah, well, it may fix it for some, but not for me - I have never seen
those messages before yesterday.