From nobody Fri Apr 10 23:23:02 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D9ACC00140 for ; Thu, 18 Aug 2022 08:26:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241978AbiHRI0K (ORCPT ); Thu, 18 Aug 2022 04:26:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33398 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239174AbiHRIZ6 (ORCPT ); Thu, 18 Aug 2022 04:25:58 -0400 Received: from out30-131.freemail.mail.aliyun.com (out30-131.freemail.mail.aliyun.com [115.124.30.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 46035AFAE7 for ; Thu, 18 Aug 2022 01:25:45 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R421e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046059;MF=xhao@linux.alibaba.com;NM=1;PH=DS;RN=6;SR=0;TI=SMTPD_---0VMZx.RB_1660811142; Received: from localhost.localdomain(mailfrom:xhao@linux.alibaba.com fp:SMTPD_---0VMZx.RB_1660811142) by smtp.aliyun-inc.com; Thu, 18 Aug 2022 16:25:43 +0800 From: Xin Hao To: sj@kernel.org Cc: akpm@linux-foundation.org, damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, xhao@linux.alibaba.com Subject: [PATCH] mm/damon/lru_sort: Move target memory region check to head of func Date: Thu, 18 Aug 2022 16:25:38 +0800 Message-Id: <20220818082538.67825-1-xhao@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" In damon_lru_sort_apply_parameters(), if "monitor_region_start" and "monitor_region_end" is not a valid physical address range, There no need to run the remainder codes in it. Signed-off-by: Xin Hao --- mm/damon/lru_sort.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c index 9de6f00a71c5..ac50dca026f9 100644 --- a/mm/damon/lru_sort.c +++ b/mm/damon/lru_sort.c @@ -378,6 +378,13 @@ static int damon_lru_sort_apply_parameters(void) unsigned int hot_thres, cold_thres; int err =3D 0; + if (monitor_region_start > monitor_region_end) + return -EINVAL; + if (!monitor_region_start && !monitor_region_end && + !get_monitoring_region(&monitor_region_start, + &monitor_region_end)) + return -EINVAL; + err =3D damon_set_attrs(ctx, sample_interval, aggr_interval, 0, min_nr_regions, max_nr_regions); if (err) @@ -401,12 +408,6 @@ static int damon_lru_sort_apply_parameters(void) return -ENOMEM; damon_add_scheme(ctx, scheme); - if (monitor_region_start > monitor_region_end) - return -EINVAL; - if (!monitor_region_start && !monitor_region_end && - !get_monitoring_region(&monitor_region_start, - &monitor_region_end)) - return -EINVAL; addr_range.start =3D monitor_region_start; addr_range.end =3D monitor_region_end; return damon_set_regions(target, &addr_range, 1); -- 2.31.0