Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits

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From: Neil Horman <nhorman@...>

To: Peter Zijlstra <a.p.zijlstra@...>

Cc: Michael Kerrisk <mtk.manpages@...>, Eugene Teo <eugeneteo@...>, <linux-kernel@...>, Ingo Molnar <mingo@...>

Subject: Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits

Date: Friday, February 29, 2008 - 8:32 am

On Thu, Feb 28, 2008 at 04:21:40PM +0100, Peter Zijlstra wrote:
quoted text> 
> On Thu, 2008-02-28 at 16:12 +0100, Michael Kerrisk wrote:
> > Peter,
> > 
> > Could you please provide some text describing RLIMIT_RTTIMEfor the
> > getrlimit.2 man page.
> 
> The rlimit sets a timeout in [us] for SCHED_RR and SCHED_FIFO tasks.
> This time is measured between sleeps, so a schedule in RR or a
> preemption in either is not a sleep - the task needs to be dequeued and
> enqueued for the timer to reset.
> 
> Upon reaching the cur limit we start giving SIGXCPU every second, upon
> reaching the hard limit we give SIGKILL - matching RLIMIT_CPU.
> 
> Time is measured in tick granularity (for now).
> 
> > Cheers,
> > 
> > Michael
> > 
> > On Fri, Feb 8, 2008 at 4:10 PM, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> > >
> > > On Fri, 2008-02-08 at 22:59 +0800, Eugene Teo wrote:
> > > > RLIMIT_RTTIME was introduced to allow the user to set a runtime timeout on
> > > > real-time tasks: http://lkml.org/lkml/2007/12/18/218. This patch updates
> > > > /proc/<pid>/limits with the new rlimit.
> > >
> > > Ah, didn't know about that file, thanks!
> > >
> > > > Signed-off-by: Eugene Teo <eugeneteo@kernel.sg>
> > >
> > > Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Neil Horman <nhorman@tuxdriver.com>


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/****************************************************
 * Neil Horman <nhorman@tuxdriver.com>
 * Software Engineer, Red Hat
 ****************************************************/
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Messages in current thread:

[PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Eugene Teo, (Fri Feb 8, 10:59 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Peter Zijlstra, (Fri Feb 8, 11:10 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Michael Kerrisk, (Thu Feb 28, 11:12 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Peter Zijlstra, (Thu Feb 28, 11:21 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Michael Kerrisk, (Fri Apr 11, 4:56 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Peter Zijlstra, (Fri Apr 11, 5:01 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Michael Kerrisk, (Fri Apr 11, 5:16 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Peter Zijlstra, (Fri Apr 11, 5:21 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Michael Kerrisk, (Fri Apr 11, 5:27 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Peter Zijlstra, (Fri Apr 11, 5:32 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Michael Kerrisk, (Fri Apr 11, 5:38 am)

RLIMIT_RTTIME documentation for getrlimit.2, Michael Kerrisk, (Fri Apr 18, 12:52 pm)

Re: RLIMIT_RTTIME documentation for getrlimit.2, Michael Kerrisk, (Mon Apr 28, 7:44 am)

Re: RLIMIT_RTTIME documentation for getrlimit.2, Peter Zijlstra, (Mon Apr 28, 8:09 am)

Re: RLIMIT_RTTIME documentation for getrlimit.2, Michael Kerrisk, (Mon Apr 28, 8:14 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Neil Horman, (Fri Feb 29, 8:32 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Michael Kerrisk, (Thu Feb 28, 11:44 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Peter Zijlstra, (Thu Feb 28, 11:50 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Michael Kerrisk, (Fri Apr 11, 3:38 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Peter Zijlstra, (Fri Apr 11, 3:45 am)

Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits, Michael Kerrisk, (Fri Apr 11, 4:01 am)

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