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| author | Thomas Gleixner <[email protected]> | 2021-07-13 13:39:49 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2021-08-10 15:57:22 +0000 |
| commit | e71a4153b7c256ec103e79875398553808aeffd2 (patch) | |
| tree | 06d723abc900f8fe1ba2202375041ae76d4e0c3b /lib/test_stackinit.c | |
| parent | hrtimer: Ensure timerfd notification for HIGHRES=n (diff) | |
| download | kernel-e71a4153b7c256ec103e79875398553808aeffd2.tar.gz kernel-e71a4153b7c256ec103e79875398553808aeffd2.zip | |
hrtimer: Force clock_was_set() handling for the HIGHRES=n, NOHZ=y case
When CONFIG_HIGH_RES_TIMERS is disabled, but NOHZ is enabled then
clock_was_set() is not doing anything. With HIGHRES=n the kernel relies on
the periodic tick to update the clock offsets, but when NOHZ is enabled and
active then CPUs which are in a deep idle sleep do not have a periodic tick
which means the expiry of timers affected by clock_was_set() can be
arbitrarily delayed up to the point where the CPUs are brought out of idle
again.
Make the clock_was_set() logic unconditionaly available so that idle CPUs
are kicked out of idle to handle the update.
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'lib/test_stackinit.c')
0 files changed, 0 insertions, 0 deletions