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

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Message-Id: <20120608095755.2676d319863e46b87b907774@canb.auug.org.au>
Date:	Fri, 8 Jun 2012 09:57:55 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>,
	Oleg Nesterov <oleg@...hat.com>
Subject: Re: linux-next: boot problem with next-20120607

Hi Andrew,

On Thu, 7 Jun 2012 15:05:49 -0700 Andrew Morton <akpm@...ux-foundation.org> wrote:
>
> On Thu, 7 Jun 2012 13:53:20 +1000 Stephen Rothwell <sfr@...b.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.

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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