* linux-next: boot problem with next-20120607
@ 2012-06-07 3:53 Stephen Rothwell
2012-06-07 22:05 ` Andrew Morton
0 siblings, 1 reply; 5+ messages in thread
From: Stephen Rothwell @ 2012-06-07 3:53 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-next, linux-kernel, Konstantin Khlebnikov
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Hi Andrew,
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?
--
Cheers,
Stephen Rothwell sfr@canb.auug.org.au
P.S. that patch also has conflict markers in the commit message ...
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: linux-next: boot problem with next-20120607
2012-06-07 3:53 linux-next: boot problem with next-20120607 Stephen Rothwell
@ 2012-06-07 22:05 ` Andrew Morton
2012-06-07 22:20 ` Stephen Warren
2012-06-07 23:57 ` Stephen Rothwell
0 siblings, 2 replies; 5+ messages in thread
From: Andrew Morton @ 2012-06-07 22:05 UTC (permalink / raw)
To: Stephen Rothwell
Cc: linux-next, linux-kernel, Konstantin Khlebnikov, Oleg Nesterov
On Thu, 7 Jun 2012 13:53:20 +1000
Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> Hi Andrew,
>
> 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?
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.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: linux-next: boot problem with next-20120607
2012-06-07 22:05 ` Andrew Morton
@ 2012-06-07 22:20 ` Stephen Warren
2012-06-07 23:57 ` Stephen Rothwell
1 sibling, 0 replies; 5+ messages in thread
From: Stephen Warren @ 2012-06-07 22:20 UTC (permalink / raw)
To: Andrew Morton
Cc: Stephen Rothwell, linux-next, linux-kernel, Konstantin Khlebnikov,
Oleg Nesterov
On 06/07/2012 04:05 PM, Andrew Morton wrote:
> On Thu, 7 Jun 2012 13:53:20 +1000
> Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
>> Hi Andrew,
>>
>> 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?
>
> 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.
I see those same errors on my ARM system. I found that reverting that
patch (105d42c mm: correctly synchronize rss-counters at exit/exec) made
them go away, although I didn't investigate whether that just removed
some debug print or actually solved a problem.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: linux-next: boot problem with next-20120607
2012-06-07 22:05 ` Andrew Morton
2012-06-07 22:20 ` Stephen Warren
@ 2012-06-07 23:57 ` Stephen Rothwell
2012-06-08 0:50 ` Stephen Rothwell
1 sibling, 1 reply; 5+ messages in thread
From: Stephen Rothwell @ 2012-06-07 23:57 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-next, linux-kernel, Konstantin Khlebnikov, Oleg Nesterov
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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.
--
Cheers,
Stephen Rothwell sfr@canb.auug.org.au
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: linux-next: boot problem with next-20120607
2012-06-07 23:57 ` Stephen Rothwell
@ 2012-06-08 0:50 ` Stephen Rothwell
0 siblings, 0 replies; 5+ messages in thread
From: Stephen Rothwell @ 2012-06-08 0:50 UTC (permalink / raw)
To: Andrew Morton
Cc: linux-next, linux-kernel, Konstantin Khlebnikov, Oleg Nesterov
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Hi Andrew,
On Fri, 8 Jun 2012 09:57:55 +1000 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
> 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.
And with that patch reverted, I get no messages ...
--
Cheers,
Stephen Rothwell sfr@canb.auug.org.au
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^ permalink raw reply [flat|nested] 5+ messages in thread
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2012-06-07 3:53 linux-next: boot problem with next-20120607 Stephen Rothwell
2012-06-07 22:05 ` Andrew Morton
2012-06-07 22:20 ` Stephen Warren
2012-06-07 23:57 ` Stephen Rothwell
2012-06-08 0:50 ` Stephen Rothwell
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