From nobody Sun Feb 8 01:29:44 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 9C6B33B5311; Thu, 15 Jan 2026 15:20:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768490454; cv=none; b=PAadz+3C/nO/LTDn63wOfHtwesMpSTbDI6b/wRNeYGa14GkV22ros7YF3MOON/aYbn1nzAMEwKM5JjI+JJJfdeKQf3MBDZ3MzCQl+4S4hjLTTme+FCB5KT41zNkLn/RIA8EsNzn3vOt7CCKDahaDwULe+XTKlDwnBnjfE5URQGc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768490454; c=relaxed/simple; bh=liYSv1rqSeh/1ly0K+dN0fc398iVzhoj5D1pp/K03Sg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IGaNEhmcj/MuCitACwLsQURMU1NOSmMI9e80SGxgw4Ek60di27He76YXZkxmugWJqGTF1+lYfMaSrcj1HuDxM/9/TDPdHP8apJ9pZs6MhY8QFGEbvCsXHWUAK3EUDsyn1KMcMSDdR54ubIS14fLphHIoZECie6t7GPLnmbU6fYU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qioR1czQ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="qioR1czQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F168C19424; Thu, 15 Jan 2026 15:20:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768490453; bh=liYSv1rqSeh/1ly0K+dN0fc398iVzhoj5D1pp/K03Sg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qioR1czQGcX9c+h+SaZCzzuecJqpv1iUe+Wy1oY/3VxML1KS5V64I7t1eBLplWkjS u4BJU5jaHEnsSTAZEW8SnOxVc/e6opmGtxW1UHgLGVRc56yRbftnVNia8L/YWBY5nA 6HNrsUTAIXr6QamBRrt6lItmuXz5pwMUGPvNW7ZFnKGv+B2QZS/B5ZFJWMjPsPjvhw LZkMecpkIRQSrQkpqztZo3CKInSFGkq0DqihmnRf4CtnNjwWewvlKQJxpNPPPNouGc UyyA8w4JvdPwIeDO2H86MjVcP96JzKSLIKv+f3SzwPndD6pKItG0I0Y3dwwOpjaO1o N9D2L714mndNg== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 3/5] mm/damon/lru_sort: use damon_kdamond_pid() Date: Thu, 15 Jan 2026 07:20:43 -0800 Message-ID: <20260115152047.68415-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260115152047.68415-1-sj@kernel.org> References: <20260115152047.68415-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" DAMON_LRU_SORT directly uses damon_ctx->kdamond field with manual synchronization using damon_ctx->kdamond_lock, to get the pid of the kdamond. Use a new dedicated function for the purpose, namely damon_kdamond_pid(), since that doesn't require manual and error-prone synchronization. Signed-off-by: SeongJae Park --- mm/damon/lru_sort.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c index 8296f984b428..bedb9134d286 100644 --- a/mm/damon/lru_sort.c +++ b/mm/damon/lru_sort.c @@ -405,7 +405,9 @@ static int damon_lru_sort_turn(bool on) err =3D damon_start(&ctx, 1, true); if (err) return err; - kdamond_pid =3D ctx->kdamond->pid; + kdamond_pid =3D damon_kdamond_pid(ctx); + if (kdamond_pid < 0) + return kdamond_pid; return damon_call(ctx, &call_control); } =20 --=20 2.47.3