hrtimer: Ignore slack time for RT tasks in schedule_hrtimeout_range()

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commit 0c52310f26 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Davidlohr Bueso 2023-01-23 09:32:06 -08:00 • committed by Greg Kroah-Hartman

parent 51a8f31b93

commit e1c1bdaa38

1 changed files with 11 additions and 3 deletions

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kernel/time/hrtimer.c

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