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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Harry Yoo <harry.yoo@oracle.com>
Cc: Shakeel Butt <shakeel.butt@linux.dev>, Qi Zheng <qi.zheng@linux.dev>,
	hannes@cmpxchg.org, hughd@google.com, mhocko@suse.com,
	roman.gushchin@linux.dev, muchun.song@linux.dev, david@redhat.com,
	lorenzo.stoakes@oracle.com, ziy@nvidia.com, imran.f.khan@oracle.com,
	kamalesh.babulal@oracle.com, axelrasmussen@google.com,
	yuanchu@google.com, weixugc@google.com, akpm@linux-foundation.org,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	cgroups@vger.kernel.org, Muchun Song <songmuchun@bytedance.com>,
	Qi Zheng <zhengqi.arch@bytedance.com>,
	Clark Williams <clrkwllms@kernel.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	linux-rt-devel@lists.linux.dev
Subject: Re: [PATCH v1 04/26] mm: vmscan: refactor move_folios_to_lru()
Message-ID: <20251112085403.DDv0RU5k@linutronix.de>
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On 2025-11-12 17:46:51 [+0900], Harry Yoo wrote:
> > > Is PREEMPT_RT fine with this?
> > 
> > Yes.
> > The local_irq_save() is not strictly needed but I am fine with it to
> > keep it simple. The inner part is just counting.
> 
> Yeah I was wondering about this... and thanks for confirming!
The preempt_disable_nested() and no in-IRQ user makes it okay. Not the
counting, that was meant as "it is a small section". That might have
been too short of an explanation.

Sebastian