From: "David Hildenbrand (Arm)" <david@kernel.org>
To: Wandun Chen <chenwandun1@gmail.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: akpm@linux-foundation.org, ljs@kernel.org, liam@infradead.org,
vbabka@kernel.org, rppt@kernel.org, surenb@google.com,
mhocko@suse.com
Subject: Re: [PATCH] mm/memory: avoid unnecessary #PF on mTHP allocation race
Date: Tue, 12 May 2026 12:35:06 +0200 [thread overview]
Message-ID: <220524ba-e39a-4d7f-b44f-d4e2e7132397@kernel.org> (raw)
In-Reply-To: <20260512095031.1333997-1-chenwandun@lixiang.com>
On 5/12/26 11:50, Wandun Chen wrote:
> When an mTHP folio is allocated in do_anonymous_page() and the target
> pte range is not fully empty, current code would release the folio
> and return.
>
> This results an illusion that a page fault has already been processed
> even if the fact is vmf->address itself is still pte_none(). Another
> page fault will be triggered again.
Yes. Why is that a problem?
--
Cheers,
David
prev parent reply other threads:[~2026-05-12 10:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-12 9:50 [PATCH] mm/memory: avoid unnecessary #PF on mTHP allocation race Wandun Chen
2026-05-12 10:35 ` David Hildenbrand (Arm) [this message]
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