linux-kernel - Re: NMI watchdog triggering during load

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Message-ID: <54F9C1DE.9030501@oracle.com>
Date:	Fri, 06 Mar 2015 08:03:58 -0700
From:	David Ahern <david.ahern@...cle.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Mike Galbraith <efault@....de>, Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: NMI watchdog triggering during load_balance

On 3/6/15 1:51 AM, Peter Zijlstra wrote:
> On Thu, Mar 05, 2015 at 09:05:28PM -0700, David Ahern wrote:
>> Hi Peter/Mike/Ingo:
>>
>> Does that make sense or am I off in the weeds?
>
> How much of your story pertains to 3.18? I'm not particularly interested
> in anything much older than that.
>

No. All of the data in the opening email are from 2.6.39. Each kernel 
(2.6.39, 3.8 and 3.18) has a different performance problem. I will look 
at 3.18 in depth soon, but from what I can see the fundamental concepts 
of the load balancing have not changed (e.g., my tracepoints from 2.6.39 
still apply to 3.18).

David
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