From: Greg KH <greg@kroah.com>
To: Felix Moessbauer <felix.moessbauer@siemens.com>
Cc: stable@vger.kernel.org, dave@stgolabs.net, tglx@linutronix.de,
bigeasy@linutronix.de, petr.ivanov@siemens.com,
jan.kiszka@siemens.com
Subject: Re: [PATCH v3][5.10, 5.15, 6.1][1/1] hrtimer: Ignore slack time for RT tasks in schedule_hrtimeout_range()
Date: Tue, 20 Feb 2024 16:21:13 +0100 [thread overview]
Message-ID: <2024022006-charting-repressed-6064@gregkh> (raw)
In-Reply-To: <20240220150200.114173-2-felix.moessbauer@siemens.com>
On Tue, Feb 20, 2024 at 04:02:00PM +0100, Felix Moessbauer wrote:
> From: Davidlohr Bueso <dave@stgolabs.net>
>
> commit 0c52310f260014d95c1310364379772cb74cf82d upstream.
>
> While in theory the timer can be triggered before expires + delta, for the
> cases of RT tasks they really have no business giving any lenience for
> extra slack time, so override any passed value by the user and always use
> zero for schedule_hrtimeout_range() calls. Furthermore, this is similar to
> what the nanosleep(2) family already does with current->timer_slack_ns.
>
> Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> Link: https://lore.kernel.org/r/20230123173206.6764-3-dave@stgolabs.net
> Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com>
Now queued up, thanks.
greg k-h
prev parent reply other threads:[~2024-02-20 15:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-20 15:01 [PATCH v3][5.10, 5.15, 6.1][0/1] hrtimer: Ignore slack time for RT tasks Felix Moessbauer
2024-02-20 15:02 ` [PATCH v3][5.10, 5.15, 6.1][1/1] hrtimer: Ignore slack time for RT tasks in schedule_hrtimeout_range() Felix Moessbauer
2024-02-20 15:21 ` Greg KH [this message]
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