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From: SJ Park <sj@kernel.org>
To: Igor Putko <igorpetindev@gmail.com>
Cc: SJ Park <sj@kernel.org>,
	akpm@linux-foundation.org,
	damon@lists.linux.dev,
	linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/damon/vaddr: check address space stability before VMA traversal
Date: Tue, 30 Jun 2026 18:08:13 -0700
Message-ID: <20260701010814.96836-1-sj@kernel.org>
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On Tue, 30 Jun 2026 18:25:58 +0300 Igor Putko <igorpetindev@gmail.com> wrote:

> In __damon_va_three_regions(), the VMA tree is traversed without
> checking if the address space is stable. If the OOM reaper runs
> concurrently, it may mark the mm as MMF_UNSTABLE and leave empty
> markers in the maple tree.

I initially thought this is correct, but...  Hasn't the series starting from
commit bed76bec3111 ("mm: relocate the page table ceiling and floor
definitions") fixed the issue?


Thanks,
SJ

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