linux-kernel - Re: [PATCH] sched/topology: Assert non-NUMA topology masks don't (partially) overlap

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Message-ID: <51417b97-c5c9-c0b7-d7c8-5e850acbf984@arm.com>
Date:   Thu, 16 Jan 2020 10:48:52 +0000
From:   Valentin Schneider <valentin.schneider@....com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org, sudeep.holla@....com,
        prime.zeng@...ilicon.com, dietmar.eggemann@....com,
        morten.rasmussen@....com, mingo@...nel.org
Subject: Re: [PATCH] sched/topology: Assert non-NUMA topology masks don't
 (partially) overlap



On 16/01/2020 10:44, Peter Zijlstra wrote:
> On Wed, Jan 15, 2020 at 04:09:15PM +0000, Valentin Schneider wrote:
>> A "less intrusive" alternative is to assert the sd->groups list doesn't get
>> re-written, which is a symptom of such bogus topologies. I've briefly
>> tested this, you can have a look at it here:
>>
>>   http://www.linux-arm.org/git?p=linux-vs.git;a=commit;h=e0ead72137332cbd3d69c9055ab29e6ffae5b37b
> 
> Something like that might still make sense. Can't never be too careful,
> right ;-)
> 

True. I'll ponder about it and see if I can't make it a bit neater