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Date: Tue, 18 Aug 2026 11:55:26 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: "David Hildenbrand (Arm)" <david@kernel.org>
Cc: Leon Hwang <leon.hwang@linux.dev>, linux-mm@kvack.org, Muchun Song
 <muchun.song@linux.dev>, Oscar Salvador <osalvador@suse.de>,
 linux-kernel@vger.kernel.org, Lance Yang <lance.yang@linux.dev>
Subject: Re: [PATCH] hugetlb: add cond_resched() to __unmap_hugepage_range()
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On Tue, 18 Aug 2026 20:21:37 +0200 "David Hildenbrand (Arm)" <david@kernel.org> wrote:

> >>>  		if (!ptep) {
> >>>  			address |= last_addr_mask;
> >>
> >> As Michal just put it:
> >>
> >> "PREEMPT_NONE is effectivelly dead and most cond_resched will/should be
> >> removed. Is there any reason why you are not using full preemption when
> >> requiring low latencies?"
> >>
> >> https://lore.kernel.org/r/aoRnUxUlgf_kRlm8@tiehlicka
> > 
> > That's pretty bad behavior and we might want to fix it in earlier
> > kernels.  Is PREEMPT_NONE effectively dead in 6.18.x and its
> > existing users?
> > 
> > If yes, we do want to fix older kernels then we should merge this.
> > 
> 
> Okay, but that would be stable-only fixes?

Not understanding.

Maybe you refer to adding a patch to -stable but not to -linus?  That's
against the -stable rules
(Documentation/process/stable-kernel-rules.rst).