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

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From: Michael Kerrisk <mtk.manpages@...>
To: Peter Zijlstra <a.p.zijlstra@...>
Cc: Michael Kerrisk <mtk.manpages@...>, Eugene Teo <eugeneteo@...>, <linux-kernel@...>, Neil Horman <nhorman@...>, Ingo Molnar <mingo@...>
Subject: Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/limits
Date: Friday, April 11, 2008 - 3:38 am

On Thu, Feb 28, 2008 at 5:50 PM, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:

Peter,

I've been testing this patch.  Above you seemed to be saying that
doing a sched_yield() would be equivalent to a sleep, causing the rt
counter to be reset to zero.  Howver, the results I'm seeing suggest
that a sched_yield() does not cause the counter to be reset to zero
(i.e., despite calling sched_yield() at frequent intervals, the
process still encounters the RLIM_RTTIME soft limit and gets SIGXCPU).
 Can you comment?

Cheers,

Michael
-- 
Michael Kerrisk
Maintainer of the Linux man-pages project
http://www.kernel.org/doc/man-pages/
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Messages in current thread:
[PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/limits, Eugene Teo, (Fri Feb 8, 10:59 am)
Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/limits, Peter Zijlstra, (Fri Feb 8, 11:10 am)
Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/limits, Michael Kerrisk, (Thu Feb 28, 11:12 am)
Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/limits, Peter Zijlstra, (Thu Feb 28, 11:21 am)
Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/limits, Michael Kerrisk, (Fri Apr 11, 4:56 am)
Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/limits, Peter Zijlstra, (Fri Apr 11, 5:01 am)
Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/limits, Michael Kerrisk, (Fri Apr 11, 5:16 am)
Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/limits, Peter Zijlstra, (Fri Apr 11, 5:21 am)
Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/limits, Michael Kerrisk, (Fri Apr 11, 5:27 am)
Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/limits, Peter Zijlstra, (Fri Apr 11, 5:32 am)
Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/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/&lt;pid&gt;/limits, Neil Horman, (Fri Feb 29, 8:32 am)
Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/limits, Michael Kerrisk, (Thu Feb 28, 11:44 am)
Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/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/&lt;pid&gt;/limits, Peter Zijlstra, (Fri Apr 11, 3:45 am)
Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/&lt;pid&gt;/limits, Michael Kerrisk, (Fri Apr 11, 4:01 am)