Re: [PATCH][5.10, 5.15, 6.1][1/1] hrtimer: Ignore slack time for RT tasks in schedule_hrtimeout_range()

On Mon, Feb 19 2024 at 09:08, Felix Moessbauer wrote:

From: Davidlohr Bueso dave@stgolabs.net

This lacks a reference to the upstream commit.

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