All of lore.kernel.org
 help / color / mirror / Atom feed
From: Thomas Gleixner <tglx@linutronix.de>
To: "MOESSBAUER, Felix" <felix.moessbauer@siemens.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: "qyousef@layalina.io" <qyousef@layalina.io>,
	"frederic@kernel.org" <frederic@kernel.org>,
	"Kiszka, Jan" <jan.kiszka@siemens.com>,
	"bigeasy@linutronix.de" <bigeasy@linutronix.de>,
	"anna-maria@linutronix.de" <anna-maria@linutronix.de>
Subject: Re: [PATCH v3 1/1] hrtimer: use and report correct timerslack values for realtime tasks
Date: Wed, 14 Aug 2024 12:42:27 +0200	[thread overview]
Message-ID: <8734n7per0.ffs@tglx> (raw)
In-Reply-To: <76cd1f3e07c6c12a7dceac31cdf7a3ca8d1e8265.camel@siemens.com>

On Tue, Aug 13 2024 at 10:23, Felix MOESSBAUER wrote:
> On Tue, 2024-08-13 at 11:45 +0200, Thomas Gleixner wrote:
>> Why are you declaring that a RT task has to have 0 slack if we are
>> lifting the hard coded slack zeroing in the hrtimer functions?
>
> This is what the manpage states [1]:
>
> + Timer slack is not applied to threads that are scheduled under a
> + real-time scheduling policy (see sched_setscheduler(2)).
>
> [1] https://man7.org/linux/man-pages/man2/PR_SET_TIMERSLACK.2const.html

Fair enough. Mention it in the changelog please.

Thanks,

        tglx

      reply	other threads:[~2024-08-14 10:42 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-08-13  7:29 [PATCH v3 0/1] hrtimer: More fixes for handling of timer slack of rt tasks Felix Moessbauer
2024-08-13  7:29 ` [PATCH v3 1/1] hrtimer: use and report correct timerslack values for realtime tasks Felix Moessbauer
2024-08-13  9:45   ` Thomas Gleixner
2024-08-13 10:23     ` MOESSBAUER, Felix
2024-08-14 10:42       ` Thomas Gleixner [this message]

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=8734n7per0.ffs@tglx \
    --to=tglx@linutronix.de \
    --cc=anna-maria@linutronix.de \
    --cc=bigeasy@linutronix.de \
    --cc=felix.moessbauer@siemens.com \
    --cc=frederic@kernel.org \
    --cc=jan.kiszka@siemens.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=qyousef@layalina.io \
    /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
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.