linux-kernel - Re: [PATCH] sched: add sanity check in partition_sched

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Date:	Tue, 04 Nov 2008 18:06:14 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH] sched: add sanity check in partition_sched_domains()

> a small detail, i changed this:
> 
>> +		BUG_ON(dattr_new);
> 
> to WARN_ON_ONCE().
> 
> If there's a rare setup-time memory leak we dont want to crash the box 
> via a BUG_ON(), as that only results in unhappy users. We want a 
> WARN_ON_ONCE() so that we get nice bugreports and kerneloops.org 
> coverage as well instead.
> 
> We use BUG_ON() in new code only in the rarest of circumstances: if we 
> absolutely want to bring down the box right there - because there's a 
> serious risk of data corruption, security breach, etc.
> 

I see the point, thx for the explanation. :)

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