Re: [PATCH v14 09/12] unwind deferred: Use SRCU unwind_deferred_task_work()

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On Thu, 17 Jul 2025 09:27:34 -0700
"Paul E. McKenney" <paulmck@xxxxxxxxxx> wrote:

> > Two, I'm still grasping at the concept of srcu_fast (and srcu_lite for
> > that matter), where I rather be slow and safe than optimize and be
> > unsafe. The code where this is used may be faulting in user space
> > memory, so it doesn't need the micro-optimizations now.  
> 
> Straight-up SRCU and guard(srcu), then?  Both are already in mainline.
> 
> Or are those read-side smp_mb() calls a no-go for this code?

As I stated, the read-side is likely going to be faulting in user space
memory. I don't think one or two smp_mb() will really make much of a
difference ;-)

It's not urgent. If it can be switched to srcu_fast, we can do it later.

Thanks,

-- Steve




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