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From: SeongJae Park <sj@kernel.org>
To: Cunlong Li <shenxiaogll@gmail.com>
Cc: SeongJae Park <sj@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	damon@lists.linux.dev, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/damon/vaddr: drop redundant mmap_read_lock from damon_va_three_regions
Date: Sun,  7 Jun 2026 10:36:44 -0700	[thread overview]
Message-ID: <20260607173644.93883-1-sj@kernel.org> (raw)
In-Reply-To: <20260607-rcu-v1-1-3c9f5995a3a0@gmail.com>

Hello Cunlong,

On Sun, 07 Jun 2026 21:48:52 +0800 Cunlong Li <shenxiaogll@gmail.com> wrote:

> __damon_va_three_regions() already walks VMAs under rcu_read_lock(), so
> the outer mmap_read_lock() is no longer needed.

The function aims to read a snapshot of the virtual address space.  So I think
mmap_read_lock() is still required.  Please let me know if I'm missing
something.


Thanks,
SJ

[...]

  parent reply	other threads:[~2026-06-07 17:36 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-07 13:48 [PATCH] mm/damon/vaddr: drop redundant mmap_read_lock from damon_va_three_regions Cunlong Li
2026-06-07 14:00 ` sashiko-bot
2026-06-07 17:26   ` SeongJae Park
2026-06-07 17:36 ` SeongJae Park [this message]
2026-06-08  3:32   ` Cunlong Li

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