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From: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: mingo@elte.hu, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH] RTTIME watchdog timer proc interface
Date: Wed, 13 Feb 2008 09:57:29 -0800	[thread overview]
Message-ID: <47B32F89.7080309@ct.jp.nec.com> (raw)
In-Reply-To: <1202894869.14326.1.camel@twins>

Peter Zijlstra wrote:
> On Tue, 2008-02-12 at 14:21 -0800, Hiroshi Shimamoto wrote:
>> Peter Zijlstra wrote:
>>> On Mon, 2008-02-11 at 13:44 -0800, Hiroshi Shimamoto wrote:
>>>> Hi Ingo,
>>>>
>>>> I think an interface to access RLIMIT_RTTIME from outside is useful.
>>>> It makes administrator able to set RLIMIT_RTTIME watchdog to existing
>>>> real-time applications without impact.
>>>>
>>>> I implemented that interface with /proc filesystem.
>>> /proc/<pid>/tasks/<tid>/rttime might also make sense.
>>>
>> thanks, I'll add.
> 
> I just realized that because its an rlimit, we store these values
> process-wide. The per task thing was a feature request from someone, and
> I just jumped on your interface without proper consideration.

I know RLIMIT_RTTIME is process-wide.
I'm not sure that someone requests for the per task.

> 
> I'll need to think a bit more on this

OK.

Thanks,
Hiroshi Shimamoto

      reply	other threads:[~2008-02-13 17:57 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-11 21:44 [RFC PATCH] RTTIME watchdog timer proc interface Hiroshi Shimamoto
2008-02-11 21:52 ` Peter Zijlstra
2008-02-11 23:03   ` Alexey Dobriyan
2008-02-12 22:21   ` Hiroshi Shimamoto
2008-02-13  9:27     ` Peter Zijlstra
2008-02-13 17:57       ` Hiroshi Shimamoto [this message]

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