On Wed, Feb 18 2026 at 14:09, Vishal Chourasia wrote:
> Expedite synchronize_rcu during the SMT mode switch operation when
> initiated via /sys/devices/system/cpu/smt/control interface
>
> SMT mode switch operation i.e. between SMT 8 to SMT 1 or vice versa and
> others are user driven operations and therefore should complete as soon
> as possible. Switching SMT states involves iterating over a list of CPUs
> and performing hotplug operations. It was found these transitions took
> significantly large amount of time to complete particularly on
> high-core-count systems.
This changelog is neither explaining the underlying problem, nor
explaining why expedite solves it and does not contain numbers which
justify the change.
Thanks,
tglx
