linux-kernel - Re: [PATCH 0/3] sched: newidle and RT wake-buddy fixes

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Date:	Tue, 08 Jul 2008 06:38:54 -0600
From:	"Gregory Haskins" <ghaskins@...ell.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	<rostedt@...dmis.org>, <peterz@...radead.org>, <npiggin@...e.de>,
	<linux-kernel@...r.kernel.org>, <linux-rt-users@...r.kernel.org>
Subject: Re: [PATCH 0/3] sched: newidle and RT wake-buddy fixes

>>> On Thu, Jul 3, 2008 at 11:12 AM, in message <20080703151209.GA17059@...e.hu>,
Ingo Molnar <mingo@...e.hu> wrote: 

> * Ingo Molnar <mingo@...e.hu> wrote:
> 
>> 
>> * Gregory Haskins <ghaskins@...ell.com> wrote:
>> 
>> > I may have found the issue: It looks like the hunk that initially 
>> > disables interrupts in load_balance_newidle() was inadvertently 
>> > applied to load_balance() instead during the merge to linux-tip.  If 
>> > you fold the following patch into my original patch, it should set 
>> > things right again.
>> 
>> ah, sorry - indeed! I've reactivated your patch and i'm testing it 
>> now.
> 
> -tip testing found that it still hangs at:

Hmm..my fix + your config booted for me at the time I submitted it.  I will try to repro
this issue with the new info.

Regards,
-Greg

> 
>  Intel machine check architecture supported.
>  Intel machine check reporting enabled on CPU#1.
>  x86 PAT enabled: cpu 1, old 0x7040600070406, new 0x7010600070106
>  CPU1: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ stepping 02
>  Brought up 2 CPUs
>  Total of 2 processors activated (8044.97 BogoMIPS).
>  [...]
> 
> with this config:
> 
>   http://redhat.com/~mingo/misc/config-Thu_Jul__3_16_49_53_CEST_2008.bad
> 
> on 3 separate test-systems.
> 
> I've again reverted both your fixup and the original commit. I've pushed 
> out the failing tree to the tmp.sched/devel.fe6149f5e82 -tip branch, you 
> should be able to reproduce it.
> 
> 	Ingo
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