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Date:   Mon, 15 Apr 2019 17:25:49 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     "chengjian (D)" <cj.chengjian@huawei.com>
Cc:     huawei.libin@huawei.com, xiexiuqi@huawei.com,
        yangyingliang@huawei.com, mingo@redhat.com,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] sched/fair: Use 'unsigned long' for
 group_shares,group_runnable
Message-ID: <20190415152549.GQ11158@hirez.programming.kicks-ass.net>
References: <20190413033234.30002-1-cj.chengjian@huawei.com>
 <20190415124617.GP11158@hirez.programming.kicks-ass.net>
 <eb7dede4-9668-9252-b95a-e20e313c5890@huawei.com>
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On Mon, Apr 15, 2019 at 11:20:31PM +0800, chengjian (D) wrote:
> Hi, Peter
> 
> 
> On 2019/4/15 20:46, Peter Zijlstra wrote:
> 
> I write a demo about this, which I described it as overflow.

I'm not saying there's no overflow, I'm saying there's nothing UB about
it.