From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DF4F5363087; Tue, 14 Jul 2026 14:32:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784039568; cv=none; b=Xz9uaoybDYEDv9thYjati/ds/e9unl50N56Rw/1xgzcXyIaZ4o19IBUZJlFdAh7YFaUSzVmQSHCz6oi7buedBevFS5GHmOwonZTGfkcrQTXdbVfxDbZZrBU76hu1619AIbnji37kuUcuya7FPrDY5oDh/HpWVAXjD56IMqv7/xc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784039568; c=relaxed/simple; bh=cnThNbpOT7mEOezExLgH4EzRvvlsWUdaGxDU1BdYgMI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XKDLlMrmxfoTzAsdaF6Tt7+2yLBxINtzq/C/7hJgUEE8MU8HufwAA+ZCP+dZeCErDKPKIXLmeYvj2N7/+iWNQyFvzSCyJRlmOFNtwHTr9m0StOkToRbiIa43GeLhTqsIQoWGa+46JgMswUL9/q4BZ9Xe99cJIaAwU3E2SyhnRic= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZZ4dqq/N; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZZ4dqq/N" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 689B91F000E9; Tue, 14 Jul 2026 14:32:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784039562; bh=5/zj5P3kBIK7G1tNe4Uj26Vul5lA6c8YvgqeoVqk8Lk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ZZ4dqq/NLYqzSBAfNqEuQPntKdDEgDfavpxCNEIReUT2xcPV9tGz8TIGmXkdJmtmm nyaIZjSVagD1HUrgFxm/UBjbTlNEYIgP3rIl7n0meCQ2szIcUNjZ05f8aKXcZ86S0D 7ag9fFiulW78YngOCtCIvNf7WTvqyLFRunseiNJS4CYzTKUeigxoHPJAVrZOVK1Bhy fSu+hxitS/iMtDtvBRaZTd8QJs+aKxwSODjhTa7lxZPi3Z6CdeZoT5d0BH7jEywOa0 +Cs5jPEytY5O5UGJ7R28senYzRux/PPPxGzWAJ8i/mDGmX5hcgK4/im3g5oGEeqdAF 66QJGXNFmnKxA== From: SJ Park To: SJ Park Cc: Andrew Morton , stable@vger.kernel.org, Brendan Higgins , David Gow , Fernand Sieber , Leonard Foerster , SeongJae Park , Shakeel Butt , damon@lists.linux.dev, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 0/5] mm/damon: unurgent fixes for infinite loop, NULL de-ref and races Date: Tue, 14 Jul 2026 07:32:34 -0700 Message-ID: <20260714143235.100843-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260714135236.92699-1-sj@kernel.org> References: Precedence: bulk X-Mailing-List: damon@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Tue, 14 Jul 2026 06:52:28 -0700 SJ Park wrote: > Sashiko found a few issues in DAMON that could cause infinite loop, NULL > dereference and monitoring results degradation. The first two sounds > scary but the infinite loop happens only under unreasonable user setup. > The NULL dereference is only in a unit test. Monitoring results > degradation is trivial since it is only best-effort, and those happens > from only unlikely races. Still those are bugs that better to fix if > possible. Fix those. Sashiko found one more bug that may better to be fixed together with this series. Also patch 5 mistakenly lacks its Fixes: tag. I will post a new version of this series with the fixes. Please don't pick this series into mm-new for now. Thanks, SJ [...]