linux-kernel - Re: [PATCH 2/2] mm: pgtable: remove unnecessary split ptlock for kernel PMD page

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Date: Fri, 2 Feb 2024 11:16:02 +0800
From: Muchun Song <muchun.song@...ux.dev>
To: Qi Zheng <zhengqi.arch@...edance.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
 Arnd Bergmann <arnd@...db.de>,
 david@...hat.com,
 willy@...radead.org,
 linux-mm@...ck.org,
 linux-kernel@...r.kernel.org,
 linux-arch@...r.kernel.org
Subject: Re: [PATCH 2/2] mm: pgtable: remove unnecessary split ptlock for
 kernel PMD page



> On Feb 1, 2024, at 16:05, Qi Zheng <zhengqi.arch@...edance.com> wrote:
> 
> For kernel PMD entry, we use init_mm.page_table_lock to protect it, so
> there is no need to allocate and initialize the split ptlock for kernel
> PMD page.
> 
> Signed-off-by: Qi Zheng <zhengqi.arch@...edance.com>

Reviewed-by: Muchun Song <muchun.song@...ux.dev>

Thanks.