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Date: Wed, 27 May 2026 13:46:37 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: "Li Zhe" <lizhe.67@bytedance.com>
Cc: <apopple@nvidia.com>, <arnd@arndb.de>, <bp@alien8.de>,
 <dave.hansen@linux.intel.com>, <david@kernel.org>, <kees@kernel.org>,
 <mingo@redhat.com>, <rppt@kernel.org>, <tglx@kernel.org>,
 <linux-arch@vger.kernel.org>, <linux-hardening@vger.kernel.org>,
 <linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>, <x86@kernel.org>
Subject: Re: [PATCH v3 0/8] mm: speed up ZONE_DEVICE memmap initialization
Message-Id: <20260527134637.29621cc94aba22eb02f3a544@linux-foundation.org>
In-Reply-To: <20260527033636.28231-1-lizhe.67@bytedance.com>
References: <20260527033636.28231-1-lizhe.67@bytedance.com>
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On Wed, 27 May 2026 11:36:28 +0800 "Li Zhe" <lizhe.67@bytedance.com> wrote:

> This series reduces latency in paths which create or recreate
> ZONE_DEVICE memmaps. Pmem hotplug is a concrete example.
> 
> memmap_init_zone_device() can spend a substantial amount of time
> initializing large ZONE_DEVICE ranges because it repeats nearly
> identical struct page setup for every PFN.
> 
> The series addresses that overhead in eight patches.

Thanks.  I'll take no action at this time, as it's getting late in the
-rc cycle and the patchset's review status is rather thin.

AI review had a number of things to say:
	https://sashiko.dev/#/patchset/20260527033636.28231-1-lizhe.67@bytedance.com