linux-kernel - Re: 2.6.28, limiting cpu time doesn't work

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Message-Id: <E1LlwcF-0000PC-00.ia6432-inbox-ru@f153.mail.ru>
Date:	Tue, 24 Mar 2009 05:43:47 +0300
From:	Peter Lojkin <ia6432@...ox.ru>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>, rjw@...k.pl
Subject: Re: 2.6.28, limiting cpu time doesn't work

Oleg Nesterov wrote:

> I am not sure what should we do, this needs more discussion.
> 
> Probably the most simple patch for -stable and 2.6.29 is below.
> (with this patch we don't even need update_rlimit_cpu(), afaics).

tested on both 2.6.28.9 and 2.6.29 - RLIMIT_CPU works as expected

> --- a/kernel/posix-cpu-timers.c
> +++ b/kernel/posix-cpu-timers.c
> @@ -1263,7 +1263,8 @@ static inline int fastpath_timer_check(s
>  		if (task_cputime_expired(&group_sample, &sig->cputime_expires))
>  			return 1;
>  	}
> -	return 0;
> +
> +	return sig->rlim[RLIMIT_CPU].rlim_cur != RLIM_INFINITY;
>  }
>  
>  /*

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