Re: [PATCH] lib/list_sort: introduce list_sort_nonatomic() and remove dummy cmp() calls

[Kuan-Wei Chiu]

On Tue, Mar 17, 2026 at 07:40:18AM -0700, Christoph Hellwig wrote:
> On Tue, Mar 17, 2026 at 03:38:41PM +0100, Richard Weinberger wrote:
> > ----- Ursprüngliche Mail -----
> > >> For UBIFS, this patch doesn't alter the frequency, timing, or behavior
> > >> of the cond_resched() calls at all, so I am confident that this won't
> > >> introduce any regressions.
> > > 
> > > I'd be tempted to drop the workaround and remove the cond_resched
> > > from ubifs given that entirely non-preemptible scheduling models are
> > > on their way out.
> > 
> > arm32 still has no preempt-lazy.
> > This is one of the biggest platforms where UBIFS is still used.
> 
> Time to fix that if it wants to stay alive.
> 
It seems that dropping cond_resched() right now would cause issues for
UBIFS.

Given that, let's stick with current plan for now. If we reach a point
in the future where it's safe to drop these scheduling points, we can
always revisit this and remove then.

Regards,
Kuan-Wei