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 0EB173B8BBB; Wed, 15 Jul 2026 03:33:29 +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=1784086444; cv=none; b=Uv0eGasU3NiZ9EMuUBI/eVhmui9Du71bstJzIehuUVxM9hYVjuFwn7cAwLkUr8w13XM5goNk9hYfRyxuI1zwVXqti5OOcfkWh1voR7hayHcng18jelkIjyMpXjp/NtNOvtvtlsWKK0ImckOKJvOB2SvbzcrD99Hs2gWKLlVApwo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784086444; c=relaxed/simple; bh=SAqGjEWltCWntTr9lFfdexQCFMJTv7uS02KBC6KA8EU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tmPv0dWFT3u237SGFIegxOvxLewseS9eSao4sRYMGOxbvOJKhPTbY/pDgXDMGfy5EjnD9a0pFtiZArPwK6Sm8VVXTNQN6VBjRHCda8iPW47hrxPc/e2ygCasOvHZDy5NIxn+ZPb2ReLna45roghVpfb+J84QcQN3MyVYgVXJ1tk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oeIXtBkE; 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="oeIXtBkE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4E4C1F000E9; Wed, 15 Jul 2026 03:33:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784086409; bh=EyyAlf2/bvw8+peozXRWIsuWIdLEd+I4yooKGgPuwrY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=oeIXtBkE3A5Lq2mlir6pP/PdAqoOEAqfMo/wK0x4C107XHmtPGKlJfJvbPlDeAVht uGvfAw2E8GxgcDo9kqBuuX9oYCaCXgRRImmxDlO8dFYQB86C0Uf9wYVS1NOgSowfF5 m5nLi5oOg+2vAjRUz/8y4wsB0zRcoK0VPpcfjGidXzZHhgw8X48oCZRJ1NngtIJoJh tp7RvK5lLTtHDgueVMw0pcGve4dP1ZcaBW6wOUiBBSCWSuTDSpLVGQtqVP9M0Q1OhL h9A4K+yzPxth537CM9GHWQ32wlZpx/JlSrtTSkzYwjViyAjYssik1I3v2jzGaiRcNh 1dcGOPXXqx9xg== From: SJ Park To: SJ Park Cc: Andrew Morton , stable@vger.kernel.org, Brendan Higgins , David Gow , Fernand Sieber , Leonard Foerster , Quanmin Yan , 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 v1.1 0/6] mm/damon: unurgent fixes for infinite loop, NULL de-ref and races Date: Tue, 14 Jul 2026 20:33:25 -0700 Message-ID: <20260715033325.109466-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260715031002.108504-1-sj@kernel.org> References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Tue, 14 Jul 2026 20:09:55 -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 no blocker for this series. Sashiko sent findings to damon@ mailing list [1], and I replied to all the comments. Please read those for details. [1] https://lore.kernel.org/damon/ Thanks, SJ [...]