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From: <shao.mingyin@zte.com.cn>
To: <david@kernel.org>, <akpm@linux-foundation.org>
Cc: <linux-mm@kvack.org>, <ziy@nvidia.com>, <matthew.brost@intel.com>,
	<joshua.hahnjy@gmail.com>, <byungchul@sk.com>,
	<gourry@gourry.net>, <ying.huang@linux.alibaba.com>,
	<apopple@nvidia.com>, <linux-kernel@vger.kernel.org>,
	<stable@vger.kernel.org>
Subject: Re: [PATCH v2] mm/migrate: fix softlockup in do_pages_move() with huge page arrays
Date: Mon, 9 Nov 2026 20:33:20 +0800 (CST)	[thread overview]
Message-ID: <20261109203320542JEYrsjSWEO22mMpmG7U_n@zte.com.cn> (raw)
In-Reply-To: <3b00799f-2fef-44bc-b798-79273c5c0ca7@kernel.org>

Hi David,

fair enough -- and your reading is correct: preempt=none is unselectable
under PREEMPT_DYNAMIC, and the arches that can still pick PREEMPT_NONE
have no NUMA, so mainline cannot reach this path.

I was aiming at the 6.6 LTS configs that shipped PREEMPT_NONE + NUMA: two
lines of cond_resched(), no behaviour change, same as do_pages_stat() got
in 8e934ab44389.  If you and Andrew would rather not carry a stable-only
fix, just say so and I will withdraw it.

Thanks,
Shao

      reply	other threads:[~2026-11-09 12:33 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-08  6:28 shao.mingyin
2026-11-09 12:19 ` David Hildenbrand (Arm)
2026-11-09 12:33   ` shao.mingyin [this message]

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