Messages in this thread | | | Date | Fri, 6 Aug 2021 20:02:42 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH] notifier: Make atomic_notifiers use raw_spinlock |
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On Fri, Aug 06, 2021 at 04:07:18PM +0200, Sebastian Andrzej Siewior wrote: > What do we do with this? > Do we merge this as-is, add another "robust atomic notifier" using only > raw_spinlock_t for registration and notification (for only > cpu_pm_notifier_chain) instead of switching to raw_spinlock_t for all > atomic notifier in -tree?
Right, so the problem I see with this is that notifier_chain_{,un}register() are O(n). Hardly something we should be putting under raw_spin_lock :/
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