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| author | Nicholas Piggin <npiggin@gmail.com> | 2022-04-23 00:14:46 +1000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2022-04-25 14:45:22 +0200 |
| commit | 62c1256d544747b38e77ca9b5bfe3a26f9592576 (patch) | |
| tree | 76b7ac3839b9382128b1a0b69eee7f527d95c77b /drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c | |
| parent | ce8abf340e40e1126bfcb9e7679b3d6b524ae3e0 (diff) | |
timers/nohz: Switch to ONESHOT_STOPPED in the low-res handler when the tick is stopped
When tick_nohz_stop_tick() stops the tick and high resolution timers are
disabled, then the clock event device is not put into ONESHOT_STOPPED
mode. This can lead to spurious timer interrupts with some clock event
device drivers that don't shut down entirely after firing.
Eliminate these by putting the device into ONESHOT_STOPPED mode at points
where it is not being reprogrammed. When there are no timers active, then
tick_program_event() with KTIME_MAX can be used to stop the device. When
there is a timer active, the device can be stopped at the next tick (any
new timer added by timers will reprogram the tick).
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20220422141446.915024-1-npiggin@gmail.com
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c')
0 files changed, 0 insertions, 0 deletions