Re: [PATCH 05/11] smp: Enable preemption early in smp_call_function_many_cond

[Peter Zijlstra]

On Fri, Feb 06, 2026 at 04:43:48PM +0800, Chuyi Zhou wrote:

> However, 99% of callers have preemption disabled, some of them even 
> invoking it within spin_locks (for example, we might trigger a TLB flush 
> while holding pte spinlocks).

Then 99% of the callers don't benefit from this and won't see your
latency reduction -- and will be broken on PREEMPT_RT, no?