LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Neil Horman <nhorman@tuxdriver.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>,
	Eugene Teo <eugeneteo@kernel.sg>,
	linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits
Date: Fri, 29 Feb 2008 07:32:01 -0500	[thread overview]
Message-ID: <20080229123201.GA25987@hmsreliant.think-freely.org> (raw)
In-Reply-To: <1204212100.12120.9.camel@twins>

On Thu, Feb 28, 2008 at 04:21:40PM +0100, Peter Zijlstra wrote:
> 
> 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>


-- 
/****************************************************
 * Neil Horman <nhorman@tuxdriver.com>
 * Software Engineer, Red Hat
 ****************************************************/

  parent reply	other threads:[~2008-02-29 12:33 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-08 14:59 Eugene Teo
2008-02-08 15:10 ` Peter Zijlstra
2008-02-28 15:12   ` Michael Kerrisk
2008-02-28 15:21     ` Peter Zijlstra
2008-02-28 15:44       ` Michael Kerrisk
2008-02-28 15:50         ` Peter Zijlstra
2008-04-11  7:38           ` Michael Kerrisk
2008-04-11  7:45             ` Peter Zijlstra
2008-04-11  8:01               ` Michael Kerrisk
2008-02-29 12:32       ` Neil Horman [this message]
2008-04-11  8:56       ` Michael Kerrisk
2008-04-11  9:01         ` Peter Zijlstra
2008-04-11  9:16           ` Michael Kerrisk
2008-04-11  9:21             ` Peter Zijlstra
2008-04-11  9:27               ` Michael Kerrisk
2008-04-11  9:32                 ` Peter Zijlstra
2008-04-11  9:38                   ` Michael Kerrisk
2008-04-18 16:52                     ` RLIMIT_RTTIME documentation for getrlimit.2 Michael Kerrisk
2008-04-28 11:44                       ` Michael Kerrisk
2008-04-28 12:09                         ` Peter Zijlstra
2008-04-28 12:14                           ` Michael Kerrisk

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20080229123201.GA25987@hmsreliant.think-freely.org \
    --to=nhorman@tuxdriver.com \
    --cc=a.p.zijlstra@chello.nl \
    --cc=eugeneteo@kernel.sg \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=mtk.manpages@gmail.com \
    --subject='Re: [PATCH] proc: Add RLIMIT_RTTIME to /proc/<pid>/limits' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).