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| author |   Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2019-07-26 20:30:57 +0200 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2019-08-01 20:51:21 +0200 |
| commit | f5c2f0215e36d76fbb9605283dd7535af09f5770 (patch) | |
| tree | 68ba2600596eb02e2f69f27b365e615417df73c6 /kernel/stackleak.c | |
| parent | tick: Mark tick related hrtimers to expiry in hard interrupt context (diff) | |
| download | linux-dev-f5c2f0215e36d76fbb9605283dd7535af09f5770.tar.xz linux-dev-f5c2f0215e36d76fbb9605283dd7535af09f5770.zip | |
hrtimer: Move unmarked hrtimers to soft interrupt expiry on RT
On PREEMPT_RT not all hrtimers can be expired in hard interrupt context
even if that is perfectly fine on a PREEMPT_RT=n kernel, e.g. because they
take regular spinlocks. Also for latency reasons PREEMPT_RT tries to defer
most hrtimers' expiry into softirq context.
hrtimers marked with HRTIMER_MODE_HARD must be kept in hard interrupt
context expiry mode. Add the required logic.
No functional change for PREEMPT_RT=n kernels.
[ tglx: Split out of a larger combo patch. Added changelog ]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20190726185753.551967692@linutronix.de
Diffstat (limited to 'kernel/stackleak.c')
0 files changed, 0 insertions, 0 deletions