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Date: Mon, 14 Mar 2022 16:17:47 +0000
From: Matthew Wilcox <willy@...radead.org>
To: Miaohe Lin <linmiaohe@...wei.com>
Cc: akpm@...ux-foundation.org, hughd@...gle.com, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/mlock: remove unneeded start >= vma->vm_end check
On Mon, Mar 14, 2022 at 11:32:23PM +0800, Miaohe Lin wrote:
> If find_vma returns a vma, it must satisfies that start < vma->vm_end.
> Since vma list is sorted in the ascending order, so we will never see
> start >= vma->vm_end here. Remove this unneeded check.
faulty logic; vm_start + len might wrap.
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