Re: [RFC PATCH 00/10] RCU: Enable callbacks to benefit from expedited grace periods

[Frederic Weisbecker]

Hi,

Le Fri, Apr 17, 2026 at 04:11:48PM -0700, Puranjay Mohan a écrit :
> RCU callbacks only track normal grace period sequence numbers. This
> means callbacks must wait for normal GPs even when expedited GPs have
> already elapsed.
> 
> This series tracks both normal and expedited GP sequences in the
> callback infrastructure using struct rcu_gp_oldstate, so callbacks
> advance when either GP type completes.

What is the motivation behind this? When most callbacks don't have much latency
requirements between queue and invocation?

Thanks.

-- 
Frederic Weisbecker
SUSE Labs