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Tue, 20 Feb 2024 10:21:23 -0500 (EST) Date: Tue, 20 Feb 2024 16:21:13 +0100 From: Greg KH To: Felix Moessbauer 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() Message-ID: <2024022006-charting-repressed-6064@gregkh> References: <20240220150200.114173-1-felix.moessbauer@siemens.com> <20240220150200.114173-2-felix.moessbauer@siemens.com> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline 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 > > 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 > Signed-off-by: Thomas Gleixner > Link: https://lore.kernel.org/r/20230123173206.6764-3-dave@stgolabs.net > Signed-off-by: Felix Moessbauer Now queued up, thanks. greg k-h