linux-kernel - Re: [local DoS] Re: Linux 2.6.24-rc4

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Message-ID: <alpine.LFD.0.9999.0712040751170.2981@woody.linux-foundation.org>
Date:	Tue, 4 Dec 2007 07:56:17 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"Luiz Fernando N. Capitulino" <lcapitulino@...driva.com.br>
cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>, herton@...driva.com.br,
	dvgevers@...all.nl
Subject: Re: [local DoS] Re: Linux 2.6.24-rc4



On Tue, 4 Dec 2007, Luiz Fernando N. Capitulino wrote:
>
> 	sched_rr_get_interval(1, NULL);

Looks like we have a zero "cfs_rq->load.weight".

Ingo? Both sched_slice() and __sched_slice() do a divide by the runqueue 
weight, and at least dequeue_task_fair() explicitly checks for that being 
zero, so clearly zero is a possible value. Hmm?

		Linus
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