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| author | Frederic Weisbecker <[email protected]> | 2020-12-02 11:57:31 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2020-12-02 19:20:05 +0000 |
| commit | d3759e7184f8f6187e62f8c4e7dcb1f6c47c075a (patch) | |
| tree | 0c83a96f3b76385bcda96eb4eadf82377dfc28e7 /drivers/gpu/drm/lima/lima_devfreq.c | |
| parent | sched/vtime: Consolidate IRQ time accounting (diff) | |
| download | kernel-d3759e7184f8f6187e62f8c4e7dcb1f6c47c075a.tar.gz kernel-d3759e7184f8f6187e62f8c4e7dcb1f6c47c075a.zip | |
irqtime: Move irqtime entry accounting after irq offset incrementation
IRQ time entry is currently accounted before HARDIRQ_OFFSET or
SOFTIRQ_OFFSET are incremented. This is convenient to decide to which
index the cputime to account is dispatched.
Unfortunately it prevents tick_irq_enter() from being called under
HARDIRQ_OFFSET because tick_irq_enter() has to be called before the IRQ
entry accounting due to the necessary clock catch up. As a result we
don't benefit from appropriate lockdep coverage on tick_irq_enter().
To prepare for fixing this, move the IRQ entry cputime accounting after
the preempt offset is incremented. This requires the cputime dispatch
code to handle the extra offset.
Signed-off-by: Frederic Weisbecker <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/gpu/drm/lima/lima_devfreq.c')
0 files changed, 0 insertions, 0 deletions